DarkLordOfOptics
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Riflescope Type Classification

In the aftermath of SHOT, looking at different forum discussions, we seem to be getting into a little bit of a classification issue when it comes to different riflescope types. All sorts of terms get thrown around: LPVO, MPVO, Crossover, Mid-range, Long-range, Precision, Target, etc.
This confusion is not surprising. There is a lot of overlap between all these different configurations and nothing is clear cut. On top of that, it is not like anyone ever bothered to fully define them. I am as guilty of that as the next person, since I have talked about a few particular ones, but never really thought through the entire landscape. Let's give it a shot and let me know if this makes sense. I am going to first list the terms that come to mind and then keep revising this post with definitions as I think through them. Please offer your thoughts in the comments on what you think the definitions should be and whether you think additional terms should be added to the list:

1x Prismatics and RDS

Small Prism Fixed Power

Large Prims Fixed Power

LPVO
LPVO stands for Low Power Variable Optic and it is the easiest of the bunch to define. A riflescope with the magnification range tat goes down to 1x is it. If it works well on 1x, it is a good LPVO. If it does not, it isn't. I often use these as DMR scopes and they do crossover into a few other niches, but the default position of the magnification ring is 1x. I have a few of these here. If you have money to spend, Vortex Razor Gen3 1-10x24 should be on your list https://bit.ly/3w1Ah2T. If you can spend some cash and want the smallest package, that's Primary Arms PLxC 1-8x24 https://bit.ly/3Bn3951. If you want something that leans a little more in the DMR directions, Delta Stryker 1-10x28 https://annexdefense.com/delta-stryker-hd-1-10x28-rifle-scope-do-2517-1-10/. If you are new to LPVOs, Primary Arms SLX 1-6x24 with Nova reticle https://bit.ly/40LeLdt or one of the new SwampFox LPVOs with fiber reticles. I have a few LPVO recommendations (click on the recommendations banner on the right). Depending on how the scope is set up, these can have either SFP or FFP reticles.

Dangerous Game
This is another simple one. It used to mean a light, compact and durable scope of low power that can hold up to the recoil of large caliber hunting rifles. It still means that, but we can add more specificity to it. In the modern world, it is a lightweight LPVO with a high visibility SFP reticle. The reticle is typically a fairly simple pattern. The emphasis, again, is on excellent low power performance. The overall trend with LPVOs is to higher erector ratios. For a DGR scope, I am perfectly fine with a high quality 1-4x. The one additional quirk here is that while for typical LPVO applications, we do not care a ton about long eye relief, for a dangerous game scope, long eye relief is a good thing. Tract 1-8x24 is a good example here. Delta Titanium HD 1-6x24 and Stryker HD 1-6x24 fit the bill very well. Trijicon Accupoint 1-4x24 https://bit.ly/3utRSQu or 1-6x24 https://bit.ly/3OvH0Zo with a post reticle would likely be at the top of my list. Interestingly, the newly announced SFP version of the Primary Arms PLxC 1-8x24 might become the go to choice for this. It has very high build quality and spectacular 1x performance. I should put it onto a lightweight magnum and see if it survives.

MPVO
This is likely to be a more controversial definition than most. To me, this is a FFP scope with low end magnification of 2.5x or less, locking or covered windage turret and zero stop elevation turret. Sidefocus knob is preferred. Reticle should be an illuminated tree type of some sort. This scope is equally likely to be dialed with as held with. It has to work well with a clip-on, so I want the low end FOV to be 8 degrees or wider and I want the overall length to be moderate. 12.5" or less would be great. The reticle has to work well on all magnifications. The hold marks on the tree reticle have to be usable from about 7x on upward. Top end magnification is not critical, but ideally I want it at 10x or more. Objective lens diameter should be in the 32 to 44mm range. Smaller diameter objective scopes are easier to make short. Weight has to be moderate as well, ideally under 25 ounces. These scopes are excellent for DMR use on accurate semi-autos. They work equally well on compact and accurate bolt action rifles. Arguably the purest expression of the MPVO genre is March 1.5-15x42 and it currently sits on my 16" barreled 8.6BLK bolt action Fix: https://bit.ly/4bjm15X The best budget option we have for the time being is Athlon Helos BTR Gen2 2-12x42 https://bit.ly/40i1ABe The new Leupold Mark 4 2.5-10x42 is likely to be a good contender as well, although the reticle is a little suspect https://bit.ly/3StVvhy If you are a MOA shooter, Burris' new 2.5-12x42 Veracity PH, while aimed at hunters, is a very strong offering for this category as well https://bit.ly/4939QII

Tweener
Tweener scope is a term I have been using for many years. Long enough where I do not know whether I coined it or whether I lifted it somewhere else. These are smallish SFP scopes with 32 to 38mm objective diameter that were originally meant for eastern hunting, but lend themselves surprisingly well to a variety of applications. They are a perfect case of "less is more". While we tend to think of them as short range numbers, I shot my first elk with a muzzleloader wearing the now discontinued Vortex Razor HD-LH 1.5-8x32 at a bit over 300 yards. The fun part was that the guide who was with me, also had a muzzleloader with him. We ended up getting back to the truck with a field dressed elk and two loaded muzzleloaders. Rather than drive with them, he suggested a simple one shot competition. We located a rock around 500 yards from us. Whoever got closer to the rock, won. He had a fancy Gunwerks muzzleloader and a 6-24x scope with exposed elevation turrets. My muzzleloader has a fancy Arrowhead barrel on an Encore action, so not too shabby either. He got close. I hit the damn rock. Not bad for a couple of muzzleloaders in 15mph shifting wind. Tiny scope with "only" 8x on the top end did not hinder me one bit. This is not a popular scope category, but I always wonder why people do not use these more with thermal clip-ons. I do. On the low end are the ~$200 Vortex Diamondback https://bit.ly/3SGMWBb and Burris Fullfield II. There is an update coming from Burris as well. Leupold's original 2.5-8x36 was probably my inspiration for defining this category a couple of decades ago. It still lives on in a slightly refreshed form: https://bit.ly/3EV1hTx
If I ever start an optics company, I'll bring back that Razor HD-LHT 1.5-8x32 except with an illuminated dot.

Crossover
This is another category that is somewhat arbitrary, yet fairly self-explanatory. These are the riflescopes that almost equally comfortable on western hunting rifles and on competition rifles. The purest expression of the genre is likely Vortex Razor HD-LHT 4.5-22x50 https://bit.ly/41uPd5v. For this category I am looking for a FFP scope that is under 30 ounces in weight. Top end magnification of 15x or more. Bottom end magnification of 5x or less. Illuminated reticle of either tree or scale type. Overall length is not critical, since I am not hugely concerned with clip-on use, but a something of moderate length is not a bad idea. Zero stop elevation turret with rev counter paired with a covered or locking windage turret. Elevation turret lock is a good thing to have, but not strictly speaking critical. Burris XTR3i 3.3-18x50 https://bit.ly/3XVF8Ld and Delta Stryker 3.5-21x50 https://annexdefense.com/delta-stryker-hd-3-5-21x44-rifle-scope/ are other good examples of what I mean here. The newly announced Leupold Mark 4HD 4.5-18x52 should be a contender as well, but I need to spend some time with it before I make recommendations https://bit.ly/42wNDAo

Traditional Hunting
This category might be unexpectedly controversial because hunting is so different in different parts of US. It can be a 50 yards shot in the wooded areas of the Eastern seaboard or a 500 yard shot in the mountains of Wyoming. I lean toward the Crossover category above as the better choice for long shots out West. Traditional hunting scope, to me, lean toward moderate magnifications and distances that are largely within the MPBR of the cartridge. Historically, it was a 3-9x42 or 2.5-10x42 design with a simple-ish SFP reticle. Some people still preferred FFP reticles. I can go either way on this one. Some of my favourites here are SWFS 3-9x42 (FFP), Delta Titanium HD 1.5-9x45 (SFP), Vortex Razor HD-LHT 3-15x42 (SFP) https://bit.ly/49tk3xX , Leupold VX-5HD 2-10x42 https://bit.ly/49q0xCu , Trijicon Accupoint 3-9x42 (SFP) https://bit.ly/49tk3xX , Trijicon Accupoint 2.5-10x56 (SFP) https://bit.ly/42v7MXz. For these designs, I want low end magnification to be no more than 3x. Reticles have to work well on all magnifications. Duplex and #4 reticles both work well, but a simple mil-hash reticle like SWFA and Vortex Razor have are a good idea. Traditional MilDot with good illumination works well here.
Generally, illumination is not required, but nice to have.

General Purpose Practical Precision
This is typically a FFP riflescope with a 50mm or greater objective diameter. The conventional wisdom here would call for top end magnification of 20x or higher, exposed elevation and windage turrets of 10mrad or more travel per turn and a fairly sophisticated reticle. This category overlaps with crossover scopes above and long range precision below. On the low end of the magnification range, I really do not want go above 6x and keeping it at no more than 5x is better. Overall elevation adjustment range does not have to be huge. This is not a scope that has to perform ELR heroics of all sorts, although quite a few of these do end up pressed into odd applications (hence "general purpose" ) Depending on the price range, I like to have reticle illumination, but for reasonably inexpensive models I can live without it. I do want to be able to use the reticle (as a simple aiming pattern, not the tree) on low power, so an ultra thin design is not ideal here. If money is no object, S&B Ultra Short 5-20x50 with DTII+ turrets and MSR2 reticle is very hard to overlook https://bit.ly/3usGynQ On the more budget side of things, Tract Toric UHD 4-25x50 is an interesting option, especially if you do need the adjustment range https://tractoptics.com/toric-4-25x50-34mm-mrad-elr-rifle-scope. Personally, I can easily live with a 3-15x50, but it seems like 20x or more has become the market standard. To that end, if equipped with a reasonable reticle, many larger scopes fit the bill here, like the Element Theos 6-36x56 https://bit.ly/3t2MMtn and Leupold Mark 5HD 5-25x56 https://bit.ly/49s2sX3

Long Range Practical Precision
This is a little bit like the category just above, except these are almost never used for shooting on low power and I do not think I have ever seen one used below 8x. Most of these scopes are large and heavy. Most of the shooting with these happens on 15x and above. Sometimes you will dial down when scanning and looking for something. Thinner reticles are common in this category. Exposed elevation and windage turrets are nearly default. Adjustment range usually sits at 30mrad or higher. These scopes tend to be heavy. The better ones out there have excellent optical performance across the entire elevation adjustment range. Traditionally, these have been the excellent 5-25x56 designs starting with the S&B 5-25x56 https://bit.ly/3uuJDnq and branching out into a good number of options. Tangent Theta 5-25x56 https://bit.ly/3uvxqim is probably the best this configuration has to offer. More recently, 7-35x56 and 6-36x56 has become more commonplace with S&B https://bit.ly/45edsox and Vortex Razor Gen3 6-36x56 https://bit.ly/3Sa6M87 arguably leading the charge.

Short Range Target
This is not my field, to be honest with you. Still, this usually involves trying to shoot very tiny groups or hit very tiny targets all at comparatively close ranges, usually inside of 200 or 300 yards. For some distances, it is shorter than that. However, the angular size of the targets you have to hit or groups you have to make is astoundingly small. Because you are looking through comparatively little air, this is where you can work with a LOT of magnification. Some disciplines have weight limitations, so lighter weight of fixed power scopes is often an advantage. For target shooting, if you have the funds, something from March labeled "High Master" is your best bet, the 48x52 fixed power, for example: https://bit.ly/3OGI0K6 Of the more reasonably priced options, Sightron has a couple of fixed power scopes (36x45 and 45x45) and several excellent variable scopes in SII and SV lines that do very well in this discipline. Thin reticles are a benefit here, so SFP designs pretty much own paper shooting. These scopes have exposed elevation and windage turrets with very fine adjustment granularity being an advantage. 1/8MOA is most common since most of these scope are in MOA. If you are a mrad shooter, 1/10mrad clicks are worthwhile.
Airgun Field Target competitions are sorta "short range target", but deserve their own section.

Long Range Target
This is kinda like the section above except you are looking through a LOT of air since the targets are far away. Given that air quality can be all over the place, you want a variable design, usually something that goes above 40x. Again, this is where March might be king of the hill with the new 8-80x56 High Master https://bit.ly/4bxMuwA, but there are reasonable options out there from Vortex, Delta, Sightron, Nightforce, etc. F-Class guys seem to live on 40x, but depending on what mirage is doing, you want to have the ability to adjust magnification.

Field Target scopes
This category is an odd mix of short range target and practical precision. You shoot at very tiny targets that are not that far away. The problem is that you shoot with tiny airgun pellets that have a lot of drop. Those tiny targets are sitting at unknown distances. Field Target competition is, to be honest, a blast and is probably the fastest growing precision shooting discipline we have. F/T scopes are calibrated at particular distances using the side focus turret. During competition, you use the side focus to measure the distance to the target and dial for trajectory. Shallow depth of field is a huge benefit for this, so high magnification helps. It is also very important for the optomechanical system to be athermal so that your side focus calibration does not change with respect to ambient temperature.
Think High Power Sightrons and Marches.

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SCR2 Mil Reticle in Burris XTR3i 3.3-18x50

As I work through the several 50m crossover scopes I have here, one of the things that becomes clearly apparent is how it is entirely feasible to have rather differing approaches to making a crossover scope.
One of the biggest differences is the treatment of the reticles.
Burris' XTR3i unabashedly approaches it from a precision/competition side of things. SCR2 Mil reticle is relatively thin, full featured and just excellent for shooting plates and other smallish targets.
That means all on its own, it is not great on low powers, especially as you get below ~6x.
That is where well designed illumination comes in. They illuminate a "T" shape that is 4 mrad wide and 3 mrad tall. You can switch between green and red illuminators depending on where you are.
The whole thing really works quite well.
Overall, there is a reason I view XTR3i 3.3-18x50 as one of my reference standard designs in the $1k range.
https://alnk.to/9bv3NDk

This video is a quick "through the scope" look at the sight ...

00:09:13
Revic Acura RS525i 5-25x50 RH2 Reticle

Here is a look through the Acura 5-25x50 scope from Revic. https://alnk.to/gp27CYM
The reticle they have in there is what is probably the best general purpose hunting reticle on the market today and the scope itself is rather nice.
It is a bit heavier than I'd like and it is in MOA. Beyond that, I am having a hard time finding something to complain about.
Now that I think about it, the one other reticle that is conceptually similar to the RH2 is Burris' 3PW-MOA in their 2.5-12x42 Veracity PH scope. That scope is normally about $1100, but EO has it for $799 at the moment for some reason https://alnk.to/h6H9yhT
That smallest of the Veracity PH scopes is another design that should be much better known than it is.
Same goes for the Revic Acura. While Revic's smart scope is well known, the more conventional Acura barely gets any mention. That's unfortunate. It is a truly excellent design.

00:12:21
Looking at Telson's PH2 Reticle

Telson is a new optics company out of Canada. I've talked about them a bit in the past. It is one of the several companies I occasionally provide input to, mostly when it comes to reticles.
The way the reticle design process went with Telson, was a little different that what I normally do. I did not just hand them over a reticle drawing. These guys are shooters and I wanted to try a more collaborative process. One of the principles at Telson, Jared, would do an iteration and send it to me. I'd go over it in some detail, mark it up and send it back to him. Then, we would get on a video conference call and hash it out.
Lather, rinse, repeat.
In the grand scheme of things, these are not my reticles. These are Telson's reticles, with me being the sounding board and providing some pointed advice.
So far, I rather like how it turned out.
I have one of their first production scopes in my hands. It has not yet been on a gun, which I will rectify shortly. I have, however, been looking ...

00:06:37
6 ARC MiniFix is Finally All Put Together

instead of being scattered all over my work bench in pieces.
It is a relatively standard MiniFix, kinda like this one https://alnk.to/dLiRqZ8 except it has a 16" Proof Research CF barrel (that Bud's price for a MiniFix, of any flavor, is the lowest I have seen in a long while).

Initial indication are that it is capable of excellent accuracy.
16" barrel is launching 108gr ELD-M Hornady factory ammo at an average of 2579fps with 32fps spread and 8.6fps StDev.

That is nicely supersonic at 1000yards at the density altitude up here (around 6k in the winter and a good bit more than that in the summer).

After a little deliberation, I decided to pop Telson's new 3-18x50 Toxin on this gun. The magnification range is a good match for the cartridge and I needed a platform to test this scope anyway. Eventually, it will likely get a 3-15x50 Tangent.

Now that I think about, I have three Fixes and three Tangents. Will it be "Tangenting the Fixes"? or "Fixing Up the Tangents"?

As shown in the pictures, ...

Athlon Closeouts

Athlon has announced a bunch of new stuff at SHOT and it looks like a few items are at closeout prices:
https://alnk.to/6bWhaL6

Several stand out.

Ares ETR 4.5-30x56 with APRS6 for $800 is very good https://alnk.to/9xkFOhq

Cronus ATS 50-640 thermal for $2400 is a steal https://alnk.to/4fRWnP0

I have one and use it all the time.

President's Day Deals

The discount industry never sleeps. I do not know why we have President's Day. All I know is that if you need to buy a mattress, this is the day.

Apparently, if you want to buy an optic or a firearm, it is not a bad day either.

Eurooptics has a 20% discount on some Vortex products and the more usual 15% on most others. The 20% requires a VTXPRES20 discount code and, apparently, applies to these items: https://alnk.to/31sCKyY

Several of the products I routinely recommend are in there Razor Gen3 6-36x56, UH-1 Gen2 and Venom 5-25x56, for example.

Field Optics Research has a 25% off with TRUMP47 discount code https://www.fieldopticsresearch.com/ I guess you now know how their politics line-up.

Primary Arms has discounted what looks like the entire Faxon product line https://alnk.to/6TBikAg

Brownells has 15% off with PRES15 discount code on quite a bit of their own stuff and on some "Brownells Only" Daniel Defense products.

Palmetto has a ton of heavily discounted stuff and I am not going ...

post photo preview
The Copper Creek Cartridge Experience
back to the reloading bench I go...

Like any self respecting firearm enthusiast I always have some number of projects going on concurrently.  One of them is a fast twist 22-250 bolt gun.  

Every once in a while Tikka makes a run of 22-250 T3x rifles with 1-8” twist barrel and I happen to have one.  That dramatically changes the varminty character of the 22-250. With a modern 80gr bullet, it is a nicely viable hunting rifle for small and medium game (just about perfect for pronghorn).  It is also a very capable long range number.  At the altitude where I live, it does not go subsonic until you get to about 1400 yards.

1-8” twist will not stabilize the heaviest available 22 bullets, but works well enough for anything up to about 80grains, depending on the bullet construction.

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Thinking About Open Light and Factory
NRL Hunter

Since my ultimate goal with competition is to shoot NRL Hunter matches in an Open Light class (to more closely resemble the rifles I actually hunt with), I set up my 308Win Fix and 6.5PRC Stag Pursuit for Open Light and Factory respectively.
I have a lot more 308Win ammo than 6.5CM anyway, so that is the rifle I prefer to practice with.

Now that I have a little time before the next Hunter match, I decided to see if I can properly control the muzzle rise with the lighter rifles.  To that extent, I went and sighted them in before proceeding with shooting at various plates mostly between 500 and 600 yards to see if I can control the  muzzle well enough to spot my misses.

The wind was pretty sporting and inconsistent today.  On top of that, I decided to use the lightweight pint-sized gamechanger bag to add to the challenge.  While we were at it, I also tested the new tripod plate from Sunway photo.  I generally like it, but it needs to be a bit wider for shooting purposes.  It is great for holding binos and a wind meter.

Here is how the bag fits on it:

Not bad, but a little more width would help.  The tripod is Field Optics Research's Dome Top Hunter 32.

The 308 Fix is a known quantity since I have talked about it quite a lot in the past.  In this iteration, I have it set up with Tangent Theta 5-25x56 in an Aadmount. 

The muzzle device is Q's Bottle Rocket on top of a Cherry Bomb.  

The bipod is Gunwerks' Elevate.

Rather amazingly, the balance on this thing is just right as is.

However, I must have made a miscalculation somewhere because I thought this would weigh just a hair below 12lbs.  It weighed in at exactly 11lbs and based on the Arizona match, my scales measure a little higher than the ones they used over there (about 5 ounce difference for my 6.5CM gun).

Despite that, I had no real issues controlling the muzzle rise with this setup.  I was able to comfortably spot my shots and see trace as long as I was properly square behind the rifle.  Interestingly, at this weight, it is something I might actually hunt with, but a lighter scope might not be a bad idea.

This also means that I have enough weight budget to use Q's Trash Panda suppressor instead of the Bottle Rocket brake.  While the brake is not obnoxiously loud, I do prefer to run with a suppressor when possible, so I will try that next.  

With the 6.5PRC, I know for a fact that without a decent brake, I could not spot my own shots, so I have Area 419's titanium Hellfire brake on it.  This was my first time shooting with it.

It was substantially loud, but not as obnoxious as some competition brakes I have seen.  More importantly, muzzle rise was minimal at most.  I doubled up on the hearing protection, but the rifle became impressively more mild mannered.  Again, shooting standing off of a tripod in the wind, I had not problem at all spotting my own shots and watching trace when shooting a bit further out.

The rifle is Stag Pursuit in 6.5PRC

The scope is Vortex Razor HD-LHT 4.5-22x50 in Talley MSR rings (the lightest 30mm rings I had on hand).

The bipod is Gunwerks' Elevate.

As shown, the rifle clocked in at 11.7lbs on my scales.  I am inclined to not mess with it too much, but if it comes to that, I can mount a somewhat heavier scope without too much trouble, but I am inclined to let it be.

I did a good number of dry presses and live fire with both rifles.  One thing that surprised me a little was that the Fix had a smaller wobble zone than the Pursuit.  I think I can attribute that to the balance point on the Fix being a little further forward, but some experimentation is in order.

I was definitely shooting better with the Fix, despite the Pursuit being chmabered for a much flatter cartridge.  Perhaps, a heavier bipod will shift the balance point sufficiently.

That is one of the advantages of the Fix design: the buttstock, while sturdy and comfortable, is so light that it is very easy to balance.  Pursuit's beefy buttstock while comfortable, could use some weight cutting.  If I want to ever use this rifle for NRL Hunter's Factory division, I can not make any mods, so I'll do with what I have.  If my arithmetic is correct, I could probably get a lightweight Ckye-pod to shift the weight a little forward.

With all that, I am not sure how I feel about trying to game this too much.  For now, I'll just shoot the rifle as is and see if I can train my way out of this wobble zone issue with some deliberate practice.

I have to admit that Area 419's muzzle brake is pretty impressive.  The rifle is now extremely soft shooting and the muzzle stays down.

The next step for the 6.5PRC is to either buy or work-up some proper match ammo.  All I have is Hornady's 143gr ELD-X which shoots pretty well in this gun, but isn't match ammo.

Hornady loads their 147gr ELDM in 6.5PRC, so that is probably the first option to try.  Looking at the costs, this might be one of the few calibers I have to reload for.

If I were to go compete with a sub-12lbs rifle today, I think I would still take the 308 Fix despite all the ballistic disadvantages.  It is probably just the familiarity factor, but I simply shoot that rifle better.  In the future... we'll see how it goes.

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Trident Barrel
by X2 Devgroup

At this point, I do not remember any more how I stumbled on this barrel, but it is not unusual for me to be looking for relatively random things while I can't sleep at night.
Then again, given how much time I spend at the range, looking at different AR barrels is not all that random.
My take on AR-15s is that they are supposed to be lightweight and accurate enough to reach to the outer limits of the capability envelope of whatever they happened to be chambered for.  I know they are plenty of people out there with freakishly accurate AR-15s that are set up with thick barrel.  They are impressively consistent, but a heavy AR-15 sorta defeats the purpose of an AR-15 to me.
Then again, I do have a couple of moderately heavy small frame AR variants.  One is built around an 18" 223Wylde WOA barrel and the other around a 22" Satern 224 Valkyrie barrel.  I'll talk about those builds in due time and I enjoy shooting both of those rifles quite a bit.  However, I view them as practice rifles since 5.56 and 224V are nice practice rounds for longer range stuff and it is easier to balance heavy barrel rifles for shooting off bags.
Most of my ARs are a lot lighter than that and they are built around 16" barrels of moderate weight.
Ideally, I want this rifle to weigh no more than 8lbs with a scope, typically an LPVO of some sort.  This is the type of rifle I expect to be equally comfortable doing timed short range drills and shooting plates between 600 and 800 yards (with appropriate ammo).
Over the years, you have seen pictures of several of these variants.  One of my favourites is built around a 16" Proof Research carbon fiber barrel.  That's the AR in this video:


I have another one built around an experimental 16" barrel that is sleeved in AlSiC, a rather exotic material.  That way of making barrels did not go into production, unfortunately.  It is not the most intrinsically accurate barrel I have, but it is very well behaved when hot.
Naturally, I also have a couple that simply have thin, near-pencil profiles.
The basic problem with most of the light weight barrels I have seen to date, is what happens when the barrel heats up.  Most barrels end up with substantially larger groups when hot, which is OK.  However, quite a few of them end up with the group centroid also changing, sometimes significantly, which is not OK.
That is an especially commo problem with carbon fiber wrapped barrels.  Christensen barrels are famous for their wandering zero.  Proof Research barrels seem to be better and the two I have do not wander around when warmed up.  However, it appears that some do.  With carbon fiber wrapped barrels I tested, Proof was the best, but it has been a little while since I experimented with it.  More recently, I have heard from others that Helix6 and Bartlein barrels are more consistent, but heavier. 

Most lightweight barrels designed for light weight have an odd (to me) profile with too much metal removed by the chamber.  Some years ago, Adams Arms had their own pencil profile barrel that left a lot more metal near the chamber, then went thing quickly.  The way Q does their light weight barrel is also done with heat distribution in mind.  Their barrel leave a lot of metal near the chamber, then run what is essentially a straight taper.

All this barrel research is probably how I stumbled onto the Trident Barrel from X2 Devgroup https://x2devgroup.com/trident-barrel/

It has very deep flutes which dramatically cuts weight.  It is about five ounces lighter than my carbon fiber Proof barrel of the same length.  Fluting can often cause problems when not properly stress relieved, but it seemed like they were paying attention to this kind of stuff and taking care to not introduce stress.  After digging through my memory banks a little, I remembered that a know someone at that company.  It was time to pick his brain.  He is a pretty serious shooter, and he was happy with these barrels.  Then he said something that made me perk up and pay attention.  He talked about vibration and how these barrels felt "dead".  That is a lot of the same verbiage I hear about structured barrels from TacomHQ.  Once my interest was properly peaked, I looked around, relaized I have enough spare parts to build an upper and that I have a built up AR-15 lower that is not attached to anything.

Once the barrel got here, I gave it a careful look.  In terms of the quality and consistency of the machining, it looked very good.  Those are some seriously deep flutes though.

The barrel, somewhat unusually, is dimpled for both of the gasblock screws and in a way that will work with the majority of gas blocks out there.

I had an Aero upper and an Aero handguard of relatively ghastly color, that probably explains why it was heavily discounted.  Since I fully expect it to be scratched up and covered by dust before too long, I could not care less.

I plan to run it with and without a suppressor, so I added Q's Cherry Bomb compensator to it.  As this is written, I have not fired it yet, but will shotly.  After some consideration, I decided to mount March's excellent 1.5-15x42 MPVO on it. https://alnk.to/b7zh0YQ  That is still the purest expresssion of the MPVO concept on the market today, so I thought it was appropriate.  Depending on how it performs, March may or may not stay on there permanently.  However, for initial break in, long range practice and accuracy evaluation, it knocks the socks off of any and every LPVO ever made.

Most AR-15s are reasonably broken in somewhere between 200 and 500 rounds, so I am not going to stress about accuracy too much in the beginning.  I'll get it sighted in, do some positional shooting and keep an eye on whether there is any abnormal behavious.

The rifle ended up weighing a bit under 6lbs without optics and a bit under 8lbs with March 1.5-15x42 in Burris XTR Signature rings. https://alnk.to/4MBZHCL The suppressor will push it a hair over 8lbs, but that's close enough.  With the bipod as pictured it just under 9lbs.  The bipod is not going to be on there permanently.  If I have to choose between a suppressor and a bipod for weight reasons, Jumbo Shrimp it is  https://alnk.to/880ol8Y

Eventually, I will likely switch to a lighter LPVO on this gun since I prefer the March on a hunting rifle, but in the meantime, configuration-wise, it is a near perfect SPR.

The nice thing about all these AR variants is how easy they are to accessorize, but all those extra gadgets do add weight.  For example, if I throw Steiner's excellent C35 v2 clip-on on there, it is another pound. https://alnk.to/8iV9jU9

An offset red dot sight will not add much weight, but it still adds a little.  Same goes for the light/laser (I think I have an extra CMR-301 https://alnk.to/880olc5 somewhere here that I can use.  It is not super fancy, but it works).

Before it is all said and done, if I keep everything on there, I will end up with am 11.5 to 12 lbs gun.  It sounds like a lot and it is.  However, if I did not start with a sub-6lbs gun before everything that I plan to latch onto it, we'd be talking about a 15lbs setup.  That's why I want a truly accurate sub-6lbs AR-15 and that is why I am always on this "holy grail" barrel search.

Stay tuned for the updates as I test this thing.

 

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