Bushmaster 0040004BLK M4 Patrolmans Upper 5.56x45mm NATO 16" Black Nitride Barrel, 7075-T6 Aluminum Black Receiver, M4 Handguard for AR-Platform $640.48
Bushmaster 0040011BLK Bravo Zulu Complete Upper 5.56x45mm NATO 16" CMV Nitride, Black, Flat Top Aluminum Rec, 14" BFI M-LOK Handgaurd, Snake Charmer Muzzle Brake, Mid-Length Gas, Fits AR-15 $607.53
Bushmaster 0040017BLK QRC Complete Upper 5.56x45mm NATO 16" Black Nitride Barrel, Aluminum Black Hard Coat Anodized Receiver, M-LOK Handguard for AR-15 $490.25