Rock River Arms Completed Upper Receiver, Operator ETR .308/7.62x51mm, 16 Inch Barrel, 1-10 Twist, Mid-Length Profile, 5/8-24 Threat, Free-Float Handguard, A2 Flash Hider, Black, OP0500BT OP0500BT

UPC:

842834101375

MPN:

OP0500BT