300 BLK 5/8" X 24- 33K Length Barrel


New US Made HK 33K length 12.5″ .300 Blackout Barrel- 5/8″- 24
Each barrel was designed for use with the wildly popular AAC style quick detach muzzle breaks and cans in the 5/8″ -24 thread pitch. Although, this barrel is perfect for just about any .300 BLK can or application.


  • Made in the USA
  • 922r Compliant (counts as 1 US made part)
  • Made From 4140 Steel
  • Nitride Finish (Same process that Sig & Glock use)
  • Can be used with all weight and grains of .300 BLK ammo

  • Overall Length – 12.5″ inches
  • Chambered – 300 Blackout
  • 1/7 barrel twist
  • Threaded 5/8″-24
  • Fully Fluted Chamber

RCM barrels are the finest US Made barrels available & come highly recommended by HKPARTS.

  • Origin: USA
  • Brand: RCM

In stock

SKU: HKP-16952

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