Complete built upper receiver:

  • 10.5″ barrel chambered in 300BLK with a 1:8 twist
  • Birdcage flash hider
  • Pistol length gas system
  • 10″ m-lok handguard
  • Flat-top mil-spec upper receiver with installed dust cover and forward assist
  • No BCG or charging handle

Direct Link: https://3crtactical.com/product/300blk-pistol-upper-10-barrel-18-twist-10-m-lok-rail/