I am selling my Bushmaster 20" Govt' profile 1:7 twist barreled upper. It has a RRA upper and bolt group. It also has a Troy 12" MRF rail installed and ARMS #40 BUIS.
It is 99.9% Has been to the range twice w/ appr. 300 rounds downrange. Excellent upper.
$740 shipped for the package. Pics via email