AR-15 .450 Bushmaster 16" steel black nitride upper assembly, This drop-in .450 Bushmaster upper will attach to virtually any standard AR-15 lower assembly. Available in 4150 Steel Black Nitride Finish, with 1 and 24" twist and rifle length slim mlok free float handguards.
Barrel - 16" 4150CMV steel black nitride hbar barrel, M4 feedramps, non-fluted. Chambered in .450 Bushmaster. Button rifled with 1-24 rh twist. .750 under gas block diameter. Threaded 5/8x32. Carbine gas system. Barrel is finished off with muzzle brake in hardened steel construction, black.
A3 flat top upper receiver - made from certified 7075-t6 aluminum forgings. Black hardcoat anodized to Gov. Specs. Forward assist and dust cover installed. M4 feedramps.
Gas system - .750 low profile gas block, made from aircraft quality steel. Mid-length gas system.
Handguards - Rifle-length mlok free float rail. Made from aircraft quality aluminum and black hard coat anodized.
Does not come with BCG or Charging Handle. Can be purchased separately.