In need a new 18" barrel.

[Djstorm100]

I have a Rainier arms select match barrel and I'm looking to replace it. Thinking of WOA because of cost point but looking in to Compass Lake barrels (Bartlien). However they offer their own chamber vs wyld and nato match. Really couldn't find anything on per say.

Would love to have 0.5MOA with hand loads (77gr).

[Mirnyx]

It's my understanding the CLE chamber is designed around the MK262 round. Have been very happy with their Douglass option.

[nate89]

Just out of curiosity, why is the Rainier barrel not working for you? I only ask because I was looking at one of their barrels for a build in the near future.

[Djstorm100]

Just out of curiosity, why is the Rainier barrel not working for you? I only ask because I was looking at one of their barrels for a build in the near future.

Going with higher quality, Compass Lake, Rainier work very well for me in my first year of matches out to 600 yards. Just upgrading. If on a budget I would do it again.

[Spooky130]

Can't wait to see what the consensus is on the best 18" barrel out there. Lots to choose from and not a ton of feedback I can find on performance though...

[pointblank4445]

My Centurion Mk12 18" barrel is like a laser with 77gr. I happen to know there is a new barrel available in the sale boards here.

[Molon]

Accuracy Evaluation of a Noveske 18” SPR Barrel


https://app.box.com/shared/static/xo7ecsfy00l7r24032azve25v4q79als.jpg




Noveske’s 18” SPR barrel is a stainless-steel barrel that has a medium contour and a 0.750” diameter gas block journal. The gas block journal for this barrel is designed for Noveske’s low profile gas block and the journal is only one inch in length; standard length gas blocks will not work with this barrel. Fortunately, Noveske’s pinned and set-screwed low profile gas block is included with the barrel (as well as an intermediate length gas tube.)




https://app.box.com/shared/static/w6ryaniwlaxl65xdym2ud4e2jqpm5871.jpg





https://app.box.com/shared/static/ckdarziwj3e0ay7jipk4qf34tfbd8qcc.jpg





The Noveske SPR barrel employs an intermediate length gas system which eliminates the short-stroke issues that are sometimes encountered in cold weather with some 18” barrels that utilize a rifle length gas system. The barrel extension has “M4” feed-ramps. The barrel has a 1:7” twist rate and polygonal rifling (not a polygonal bore.)



https://app.box.com/shared/static/9me4uu47u5ke7q89kcpx3q5ris1trr7y.jpg




https://app.box.com/shared/static/2nr1zffw7j1uhlkqf6fgqlqpbnn3epuc.jpg





The chamber found in this barrel is Noveske’s proprietary Noveske Match mod 0 chamber that “was developed to fire MK262 Mod 1 on AUTO in hot environments." I installed the SPR barrel in a Colt M4 upper receiver and free-floated the barrel with a LaRue Tactical 12” handguard.





https://app.box.com/shared/static/6mjhqvzx7yrojh30a1zss4r4e7u0hhhg.jpg





I conducted an accuracy (technically, precision) evaluation of the Noveske 18” SPR barrel from my bench-rest set-up following my usual protocol. This accuracy evaluation used statistically significant shot-group sizes and every single shot in a fired group was included in the measurements. There was absolutely no use of any group reduction techniques (e.g. fliers, target movement, Butterfly Shots).

The shooting set-up will be described in detail below. As many of the significant variables as was practicable were controlled for. Pictures of shot-groups are posted for documentation.

All shooting was conducted from a concrete bench-rest from a distance of 100 yards (confirmed with a laser rangefinder.) The free-float hand-guard of the rifle rested in a Sinclair Windage Benchrest, while the stock of the rifle rested in a Protektor bunny-ear rear bag. Sighting was accomplished via a Leupold VARI-X III set at 25X magnification and adjusted to be parallax-free at 100 yards. A mirage shade was attached to the objective-bell of the scope. Wind conditions on the shooting range were continuously monitored using a Wind Probe. The set-up was very similar to that pictured below.




https://app.box.com/shared/static/xo4duzdgtp.jpg




https://app.box.com/shared/static/lkg47ptc04.jpg




For this evaluation, I used one of my standard match-grade hand-loads topped with Sierra 55 grain BlitzKings. When fired from my Krieger barreled AR-15s, this load has produced ½ MOA 10-shot groups at 100 yards.




https://app.box.com/shared/static/n5uicctmu8ve7kxmht3zboy2inihdvzq.jpg



Three, 10-shot groups were fired in a row from the Noveske SPR barrel from a distance of 100 yards with the resulting extreme spreads:

0.812”
0.732”
0.873”

for an average 10-shot group extreme spread of 0.81”. The three, 10-shot groups were over-layed on each other using RSI Shooting Lab to form a 30-shot composite group. The mean radius of the 30-shot composite group was 0.28”



The smallest 10-shot group . . .

https://app.box.com/shared/static/fs89f0e2sy9c48p6qb2japknx67i42nd.jpg





The 30-shot composite group . . .

https://app.box.com/shared/static/o9me2v3tg4g7gqubs09r3gyttmby30yf.jpg



…

[TF82]

To preface, I'm completely out of my depth here, only passing along what I saw from another member in another thread, but thecolter seems to have had some damn impressive results with a Rainier ultra match.
https://www.m4carbine.net/showthread.php?166063-MOA-challenge/page12

[85cucvtom]

Not to hijack the thread but I'm on the market for an 18" barrel with rifle gas too.

Is there any advantage or disadvantage to an White Oak vs a Rainier Ultra Match? Both seem to be of quality.


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[rjacobs]

I have a Compass Lake Krieger, 7 twist, 18" rifle gas with the CLE chamber. Its a .5 gun when my snatchy ass trigger finger doesnt cause problems. Best group with it was .4, 5 shot at 100 yards. I cant find the picture on my phone anymore. Took about 150-180 rounds to break in and calm down though with one cleaning at around the 50rd mark.

[hotrodder636]

I think I want to wait until Compass Lake gets some more Krieger barrels in. Right now they have Douglas and Criterion. I a, not sure though, all seem like good tubes.

[gt40]

This is what I did and this is what it cost me. The scope was extra for $200 and about $69 for the rings (can get less expensive to keep under $1500).

http://forum.gon.com/showthread.php?t=857689&highlight=woa+upper

Scope is a Bushnell AR/223 with 4.5-18x40mm. Rings are Warne QD Ultra High Aluminum.

(223/5.56)

Lower = $450
Geissele SSA-E trigger = $230
WOA 18" 1 in 7" twist Varmint upper = $610
Fluting by WOA $100
Shipping = $18
=========================
Total = $ 1408.

gt40

PS: First 100 yd. 5 shot target with Sierra 65 grain Game Kings. 69 grain Match Kings shoot 3/8" groups.

[daniel87]

Looked could not find dont want to add a senseless thread for one answer.
With an 18 inch rifle gas using a slr adjustable 7 gas block what handguard length is recomended to just cover gasblock for easy adjustment with whatever tool i have on me

Thanks

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