300BLK AR Pistol Upper - 10" Barrel 1:8 Twist - 10" M-lok Rail
300BLK AR Pistol Upper - 10" Barrel 1:8 Twist - 10" M-lok Rail, 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