Windham MPC M4 Profile Complete Upper Receiver Inch Barrel Assembly With Muzzle Brake .223/5.56mm

M4 barreled upper assembly is complete and ready to snap onto your lower. Sixteen inch M4 profile barrel is chrome lined and machined from 4150 Chrome Moly Vanadium steel - rifled 1 x 9 inch right hand twist. A2 Flash Suppressor and standard A2 front sight are fitted. Machined aluminum flat top upper receiver is complete with bolt carrier assembly, forward assist, ejection port cover.