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Rainier Arms, LLC

Rainier Arms UltraMatch .223 Wylde SDM Barrel

Rainier Arms UltraMatch .223 Wylde SDM Barrel

Availability: In stock

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Inspired by the Army's DM-R rifle, this Stainless Steel barrel features 12 large flutes to reduce weight and aid in cooling. With nearly a full pound of weight removed from the first 12 inches of the barrel, where coincidentally, the majority of heat is generated, the surface area is increased by a whopping 81%. Barrel weight is reduced to just 2 lbs. 3.6 oz. The barrel is produced with match grade blanks in 1:8 twist yielding light weight and excellent accuracy needed for many applications.

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.


  • Stainless Steel Match Grade Shilen Blank
  • Twist: 1:8
  • Thread Pitch: 1/2 X 28
  • .750 Gas Block Seat
  • .223 Wylde Chamber
  • Ratchet Rifling
  • M4 Feed Ramps
  • Squad Designated Marksman SDM Contour
  • Bead Blasted Finish



10.5"- Weight: 1 lbs 6.6 oz- Carbine Gas System

14.5"- Weight: 1 lbs 12.5 oz- Mid Gas System

16"- Weight: 2 lbs 0.9 oz- Mid length Gas System

18"- Weight: 2 lbs 3.6 oz- Rifle length Gas System

20"- Weight: 2 lbs 9 oz-  Rifle Gas System

Additional Info

Additional Info

Manufacturer Rainier Arms, LLC
Finish Stainless Steel
Caliber .223 Wylde
Configuration No
Option No
Gas Length No
Height No
Rail Length No
Mount No
Profile SDM
Reticle No
Co Witness No
Size No


Customer Reviews (2)

Match Grade Accuracy Review by Michael
Picked up the 20" barrel for A DMR build. First 5 shot group after zeroing was 0.5" center to center. Largest group of the first range day was 0.8" for a 10 shot grouping. Ammo was Hornaday 75gr Superformance BTHP AT 2735 FPS. Couldn't ask for better performance. (Posted on 9/25/2016)
No commentReview by august
Like it so far. Haven't shot a lot
Of rounds still in the brake in stage
Groups are good with
69 gr smk (Posted on 8/17/2016)

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