Canadian Tactical Cowboy Supplies
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We will be attending TriggrCon betwen July 25 and July 28.
All orders made during these dates will ship on Monday, July 31. Thanks for your understanding.

Rainier Arms Select 5.56MM MEDCON Barrel - 18 - Stainless

Rainier Arms

Rainier Arms Select 5.56MM MEDCON Barrel - 18 - Stainless


There are a number of advantages to polygonal rifled barrels; such as less bullet deformation, resulting in reduced drag as well as prolonged barrel life, not to mention ease of cleaning. These barrels were made to our exact specifications & drawings and made of 416R Stainless steel. We control the manufacturing process to provide the most accurate barrel in its price range.  Guaranteed to shoot sub-MOA at 100 yards with match ammo. You deserve this confidence inspiring barrel for your next custom build. ***Medium Contour***

We took as much weight off the barrel as we could without sacrificing accuracy. We don't save a lot off the standard barrel (little over 1 oz). But for guys who are building the most accurate rifle while keeping weight down, this is the perfect barrel for you.


  • Matte Stainless


  • 416 R ordnance grade stainless steel produced in Germany by the same mill as H&K
  • F bar rated = meaning it is acceptable for use by all Nato country’s
  • Extensions made from 4140 AE = meaning aircraft grade steel
  • Manufacturing proprietary processes creates a stress free product that has a hardened surface on the bore. To improve the wear and longevity
  • M4 feed ramps on extensions to current production standards to ensure conformance between manufactures


  • Barrel Length: 18"
  • Gas Block Seat: .750
  • Rifling: Polygonal 5 Groove
  • Weight: 33.3 oz
  • Stainless Steel: 416R
  • Feed Ramps: M4
  • Gas System: Midlength
  • Chamber: 5.56MM
  • Finish: Matte Stainless
  • Twist: 1X8
  • Thread Pitch: 1/2X28
  • Testing: MPI tested
  • Made in the USA!

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