McAfee SECURE sites help keep you safe from identity theft, credit card fraud, spyware, spam, viruses and online scams
Pursue Your Passion
Rainier Arms, LLC

Rainier Arms UltraMatch 300AAC Blackout Pistol Barrel-SS

Rainier Arms UltraMatch 300AAC Blackout Pistol Barrel-SS
Sign up to get notified when this product is back in stock

Availability: Out of stock

Regular Price: $309.75

Special Price $215.43



We wanted to build an 300AAC Blackout 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.


  • Stainless Steel Match Grade Shilen Blank
  • Length: 8.5", 10.5",14.5", 16"
  • Twist: 1:8
  • Gas Block Seat: .750 Diameter
  • Thread Pitch: 5/8X24
  • 300 AAC Blackout Chamber
  • Pistol Gas System
  • 6 Groove
  • M4 Feed Ramps
  • Proprietary Contour
  • Bead Blasted Finish



  • 8.5"   1 lbs 3 oz
  • 10.5" 1 lbs 6 oz
  • 14.5" 1 lbs 12.8 oz
  • 16 "   1 lbs 15 oz


Barrel Care

For your convenience we have published barrel care recommendations for this product. The instructions are in Adobe Acrobat's Portable Document Format (PDF). You will need Adobe Acrobat Reader version 5.0 or higher to view and print the instructions.

If you do not have Adobe's Acrobat Reader, you can download a free copy at

Additional Info

Additional Info

Manufacturer Rainier Arms, LLC
Finish Stainless Steel
Caliber 300AAC
Configuration No
Option No
Gas Length Pistol
Height No
Rail Length No
Mount No
Profile No
Reticle No
Co Witness No
Size No


Customer Reviews (2)

accurateReview by
super sonic, sub sonic, whitetail deer loads , 125 to 208 grain bullets , it doesn't really matter this barrel leaves every round touching in groups fired , love this barrel highly recommend , mine is 16 inch length put on an adams arms upper with adams arms xlp block piston driven with low mass adams arms bcg, unbelieveable accuracy especially with Winchester 150 grain white tail loads - I had a hard time counting five shot groups on paper becuz 3 out of 5 where going thru same hole lol , highly accurate !!!!!!! (Posted on 11/21/2016)
No commentReview by
- (Posted on 10/19/2016)

Write Your Own Review

Only registered users can write reviews. Please, log in or register

You may also be interested in the following product(s)

Gas Tube

4 Review(s)

Faxon STREAMLINE M-LOK Handguards

1 Review(s)

Gas Tube Roll Pin

18 Review(s)
Contact Us