Excellent condition Bushmaster mil spec M4 upper with barrel cutout, M4 feed ramps and Izzy muzzle brake. 1/9 twist 5.56 NATO 16.25" barrel. Professionaly installed Bushmaster piston system. I put just 800 rounds through this upper and it is extremely smooth and reliable with ZERO carrier tilt! This is an extremely soft recoiling smooth firing upper. Excellent for follow up shots. Comes with everything you see in the pics. The scope is just a Barska red dot. Only selling so that I can buy new tires for my 1970 M35a2 "duece and a half" truck.
3 business days handling time.