This is a Bushmaster 16" A3 upper. It has an AK74 style brake on it. It also has a BMAS three rail gas block, along with a BMAS flip up front sight. It also has a Tac-Latch. Inludes bolt and bolt carrier. It has about 750 rounds of GOOD ammo (Federal, etc.) through it. I have never cleaned it with anything other than a one piece coated cleaning rod, from the chamber. It is a range queen in perfect shape.
A M/O for $435 shipped to anywhere in CONUS or add 3% for pay pal.
Pics available. Email me and I will send them