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Rainier Arms, LLC

Rainier Arms Select 5.56MM MEDCON Barrel - 20 Black

Rainier Arms Select 5.56MM MEDCON Barrel - 20 Black
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Availability: Out of stock





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. We are so confident in our Select grade barrels that we will offer a 100% money back guarantee within 90 days of purchase, no questions asked. If you aren't completely satisfied with the barrel for any reason, return it for a full refund. 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.

  • 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 countrys
  • 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
    • Specs:
      • Barrel Length: 20"
      • Gas Block Seat: .750
      • Rifling: Polygonal 5 Groove
      • Weight: 37.8 oz
      • Stainless Steel: 416R
      • Feed Ramps: M4
      • Gas System: Rifle
      • Chamber: 5.56MM
      • Finish: Black Oxide
      • Twist: 1X8
      • Thread Pitch: 1/2X28
      • Testing: MPI tested
      • Made in the USA!

Additional Info

Additional Info

Manufacturer Rainier Arms, LLC
Finish Black
Barrel Length 20"
Caliber 5.56
Configuration No
Option No
Gas Length Rifle
Height No
Rail Length No
Mount No
Profile No
Reticle No
Co Witness No
Size No


Customer Reviews (2)

No commentReview by Michael
Seriously love this Bareel. Fit and finish is fantastic. The parkerizing is done beautifully. I plan on using the 16" version for a future build. (Posted on 9/10/2016)
Great barrelReview by Peter
Haven't shot it yet but the fit and finish were literally perfect. (Posted on 7/26/2016)

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