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Micro AR Barrel Assembly 5" 300BLK

  • Brands SLR Handguards
  • Product Code: SS-300BLKBARREL
  • Availability: Out Of Stock


SLR MFG 5" 300 Blackout

Includes Barrel, Straight Gas Tube & Jet Gas Block with Hardware


  • 5" - 300 Blackout caliber
  • 4150 CMV
  • Melonite Finish
  • 5/8-24 Thread
  • Jet Gas Block with set screws and roll pin
  • Custom length straight gas tube with melonite finish
  • .750" Journal barrel pre dimpled under gas port
  • Gas port and block optimized for function with or without suppressor for all Supersonic bullet weights.
  • Gas port and block optimized to run subsonic loads with a suppressor
  • Subsonic loads without suppressor are not recommended. Function may or may not be reliable as 300BLK Subsonic loads were/are not designed to run without a suppressor.

Note- MLOK and Keymod Handguards are compatible with this assembly. Mlok nuts will clear Handguard directly under gas block.

Note- For Suppressed or Traditional muzzle devices use a 4.25" Handguard  (Receiver to muzzle shoulder distance is 4.3") or up to 5.0" Handguards if no suppressor to be used. ( Receiver to muzzle end is 4.95")

Note- For Linear Comps use a 5.5" to 6" Handguard. Generally we use a HG 1/2" longer than the barrel.

Note- Usually H to H3 buffers are used. For PDW stocks we have used the JP Std and Heavy types both seem to work the same.

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