Driven by the spirit of innovation that began more than 38 years ago, Bushmaster has PROVEN itself above all other MSR manufacturers through hard use in competition, in the woods, and on the prairies of America. Engineered with proprietary processes and manufactured to the tightest tolerances, Bushmaster firearms ensure long-lasting service in any application. For unfailing shootability, always use Bushmaster.

Ready to pin on any standard AR-15 lower, this M4A3 Upper Assembly comes from Bushmaster, a leading name in the production of modern sporting rifles. It features a Picatinny rail equipped flat top upper receiver, 16" M4 profile barrel, standard handguard and an A2 front sight post with bayonet lug. It would be a great choice for anyone wanting to build a "traditional" styled AR-15. If you're looking for top quality at an economical price, you can always count on Bushmaster.

Features and Specifications:
Manufacturer Number: 91823
Bushmaster M4A3 AR-15 5.56 Nato Complete Upper 16" A2 Sight Black
5.56 NATO (accepts .223 Remington)
16" M4 profile barrel with chrome lined chamber and bore
Flat top aircraft aluminum receiver with Picatinny rail
Standard plastic handguard
AR-15 profile (semi auto) bolt carrier group
Charging handle
A2 front sight post with bayonet lug
A2 flash hider
Color: Black

Fits:
Standard AR-15 Lower Receiver