Heckler & Koch Complete MR556 Upper Reciever Kit 16.5 in Barrel 81000584
$2169.00
Heckler & Koch Complete MR556 Upper Reciever Kit 16.5 in Barrel 81000584. 56 mm AR-style rifles to be retrofitted to HKs pusher rod system. Specifications for Heckler & Koch Complete MR556 Upper Receiver Kit: Manufacturer: Heckler & Koch Barrel Length:...