AR-15 .450 Bushmaster 18" steel black nitride upper assembly, This drop-in .450 Bushmaster upper features 4150 Steel Black Nitride Finish, with 1 and 24" twist and 15" rifle length slim Mlok free float handguards.
Barrel - 18" 4150CMV steel black nitride hbar barrel, single feedramps, non-fluted. Chambered in .450 Bushmaster. Button rifled with 1-24 rh twist. .936 under gas block diameter. Threaded 5/8x32. Midlength gas system. Barrel is finished off by 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. Socom style for big bore calibers.
Gas system - .936 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.
If you like this upper, you might also like a sister twin in 308 caliber! Images may not be an exact representation of the product.
