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Rainier Arms Ultramatch MOD2 300BLK Barrel - 10"


In stock

Satisfaction Guarantee
We are so confident in our barrels that we offer a 100% money back guarantee within 90 days of purchase.  If our barrels don’t meet or exceed your expectations, for any reason, return it for a full refund.

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Introducing our MOD2 UltraMatch barrel using the finest blank. Our goal is to mass produce them to bring them to market at the most competitive prices. We wanted the best balance between accuracy while keeping the weight down as much as possible. 

Guarantee sub-MOA with factory match ammunition.



  • Stainless Steel Match Grade Blank
  • TiN Extension
  • Length: 10"
  • Twist: 1:7.5
  • Thread Pitch: 5/8 X 24
  • .750 Gas Block Seat
  • 300BLK Chamber
  • Pistol Gas System (Gas Tube Not Included)
  • M4 Feed Ramps
  • Proprietary Contour
  • Weight: 1 lb 2.6 oz


Our Craftsmanship
Rainier barrels are meticulously designed and machined by precision gunsmiths.  Our barrels are turned same the way true artisans have made premium rifle barrels for over a century.  Each barrel have hand-cut chambers and crowns with the attention to detail that can only come from highly trained human intervention.  While most companies strive for faster production time to cut cost, we strive for perfection. There are no shortcuts with our barrels, period.

We will go toe to toe with anyone and win.

More Information
SKU RAB-UM2-300-10-P-FF
Product Type Barrel
Manufacturer Rainier Arms, LLC

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