This Bushmaster upper receiver has a chrome-lined barrel made of 4150 chrome-moly-vanadium steel finished in black parkerized. The receiver is finished in black teflon. Its handguard is carbine length that is aluminum free flost quad rail with grips panels finished black teflon. Included is flip up front and rear sights.
|Caliber||223 Remington/5.56 NATO|
|Barrel Material||4150 Chrome Moly Vanadium Steel|
|Barrel Finish||Black Parkerized|
|Product Model||5.56/223 Flat Top M4 Pre Ban|