Bought staight from Bushmaster 5 years ago but never used. The bbl rest peice has been modified by elongating the rod that pushes up against the reciever. This rod is usually too short and allows for play. I had the rod removed and machined a new one that is extra long- accordingly, any installation will require cutting down this rod. When finished, you'll have zero play unlike most other 37mm out of the box.
Comes with guard (Bushmaster) which is original Government issue black nylon handguard.
$200 plus $25 for shipping and insurance. SOLD