Heckler & Koch MR556 A4 Upper Receiver, 223 Remington/5.56 NATO, 11″ Barrel, Threaded 1/2X28, M-LOK Handguard, Anodized Finish, Black, Fits AR-15 Lower Receivers, Includes Bolt Carrier Group, Charging Handle, Buffer Weight and Buffer Spring 51000385
HK UPPER MR556A4 5.56 11″ BLK
Out of stock
HK UPPER MR556A4 5.56 11″ BLK
Out of stock
Details
Heckler & Koch MR556 A4 Upper Receiver, 223 Remington/5.56 NATO, 11″ Barrel, Threaded 1/2X28, M-LOK Handguard, Anodized Finish, Black, Fits AR-15 Lower Receivers, Includes Bolt Carrier Group, Charging Handle, Buffer Weight and Buffer Spring 51000385
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