Rainier Arms UltraMatch .223 Wylde Mid Barrel - 12.5"

**GOST** · 5 April 2015, 10:55

Description:
We wanted to build an AR15 barrel using the finest blank and mass produce them to bring them to market at the most competitive prices. Our UltraMatch barrels start out as Shilen blanks and contoured to our specifications. We wanted the best balance between accuracy while keeping the weight down as much as possible. It also features Shilen's Ratchet Rifling which allows for flatter trajectories and easier cleaning. We are so confident in our UltraMatch barrels that we will offer a 100% money back guarantee within 90 days of purchase. If you aren't completely satisfied with the barrel for any reason, return it for a full refund, no questions asked.

Features:
Stainless Steel Match Grade Shilen Blank
Length: 12.5"
Twist: 1:8
Thread Pitch: 1/2 X 28
.750 Gas Block Seat
.223 Wylde Chamber
Mid Length Gas System
Ratchet Rifling
M4 Feed Ramps
Proprietary Contour
Bead Blasted Finish
Weight: 1 lbs 12.8 oz

http://www.rainierarms.com/rainier-a...id-barrel-12-5

**GOST** · 6 April 2015, 05:07

It'll be interesting to see how these new mid-length 12.5" barrels handle.

**SINNER** · 6 April 2015, 05:21

I need to try one of these. Thinking one of these with a CMT lefty upper would run about as gas free as possible suppressed. For a lefty that is.

**Dstrbdmedic167** · 6 April 2015, 06:10

Originally Posted by GOST

It'll be interesting to see how these new mid-length 12.5" barrels handle.

I have a 12.5" ARP mid length in my SBR. Shoots like a dream. Have run it with standard block and adjustable (since I shoot suppressed now) and never have had any issues with factory ammo I mine. It's a sweet shooter as I'm sure these will be as well.

**UWone77** · 6 April 2015, 10:16

I'm building up a 12.5" Mid. I returned by 16" Rifle, because I knew I wouldn't build it up anytime soon. Throwing this on a 12" MML with a can.

**GOST** · 6 April 2015, 10:43

Look forward to seeing it.

**docsherm** · 8 April 2015, 07:25

Has anyone used this yet? I am wondering what buffer would work best with this. The 12.5" and mid gas is very unique, might be the ticket for a can though.

**UWone77** · 8 April 2015, 07:31

Originally Posted by docsherm

Has anyone used this yet? I am wondering what buffer would work best with this. The 12.5" and mid gas is very unique, might be the ticket for a can though.

doc,

I just picked one up yesterday, and it's currently at the gunsmith waiting for a gas block pinning. Hope to have it up and running at the end of the week/early next to throw on my SBR. I'll play with the buffers a bit and throw a can on it.

**docsherm** · 8 April 2015, 07:42

Originally Posted by UWone77

doc,

I just picked one up yesterday, and it's currently at the gunsmith waiting for a gas block pinning. Hope to have it up and running at the end of the week/early next to throw on my SBR. I'll play with the buffers a bit and throw a can on it.

What gas block did you go with? I was thinking of an adjustable one to get the gas correct.

Are you going to run a can on it?

Thanks, I am very interested in this set up.

**Dstrbdmedic167** · 8 May 2015, 16:26

I can't for the life of me find the thread where we discussed this barrel in the MML. It wouldn't work for UW and the "12.5" barrel I was using did work with a 12" handguard. We found out that my barrel is actually 12 ⅝" and not 12.5".

Reason for the post I received a 12.5" 277WLV barrel today and had the same issue UW had. Barrel likes "this" much from working with the 51T adapter. So back to the drawing board....

**GOST** · 8 May 2015, 16:33

Originally Posted by docsherm

Has anyone used this yet? I am wondering what buffer would work best with this. The 12.5" and mid gas is very unique, might be the ticket for a can though.

Talked to Chris Reeves of Triarc Systems who also produce a 12.5" mid-length barrel, he recommended a H buffer.

**GOST** · 8 May 2015, 16:35

Originally Posted by Dstrbdmedic167

I can't for the life of me find the thread where we discussed this barrel in the MML. It wouldn't work for UW and the "12.5" barrel I was using did work with a 12" handguard. We found out that my barrel is actually 12 ⅝" and not 12.5".

Reason for the post I received a 12.5" 277WLV barrel today and had the same issue UW had. Barrel likes "this" much from working with the 51T adapter. So back to the drawing board....

http://www.weaponevolution.com/forum...Gallery/page80

**toolboxluis00200** · 8 May 2015, 16:39

Man that is sexy love to be able to get one maybe one day I will droll droll

**turkishroy** · 8 May 2015, 20:30

Not to sound corny but I was just wondering how well this sort of gas/dwell would work. Think it would have to have a can to function? I know PWS has a MK212SD that requires a can for proper function...

**Dstrbdmedic167** · 8 May 2015, 20:39

Originally Posted by turkishroy

Not to sound corny but I was just wondering how well this sort of gas/dwell would work. Think it would have to have a can to function? I know PWS has a MK212SD that requires a can for proper function...

I use an Adj gas block and also tailor my ammo for this rifle so I have no issues. YMMV

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