HK 300 BLK 8.20″ Barrel – 5/8″ x 24″


HK53 length .300 Blackout Barrel- 5/8″- 24 Thread- 8.20″ Overall Length
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
  • Nit ride Finish (Same process that Sig & Glock use)
  • Can be used with all weight and grains of .300 BLK ammo

  • Overall Length – 8.20 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 HK Parts.

  • Origin: USA
  • Brand: RCM

Out of stock

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SKU: HKP-13907

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