This classic pre-ban style, complete AR-15 upper receiver from Bushmaster is the perfect addition to any collection. Designed to connect directly to your existing AR-15 lower receiver, this upper features a 16" M4 profile barrel with a 1:9" twist, perfect for shooting 55 grain loads. You will also receive a detachable carry handle, fixed front sight, and A2 style flash hider. This upper receiver is complete with bolt carrier group and charging handle.

Specifications and Features:
Bushmaster M4A3 Complete Upper Assembly 91822
5.56 NATO caliber (accepts .223 Remington)
16" M4 chrome lined barrel
1:9" twist
A2 style flash hider
Flat Top receiver
Removable carry handle
Two Piece plastic handguards
Direct gas impingement system
Carbine length Handguards
7075 T6 aircraft grade aluminum
Manganese phosphate coated
Hard anodized mil-spec finish
Black