New HK Factory German MR556 Upper Kit with M-Lok forearm
Only a few available latest HK production.HK MR556 Upper kit includes:- Complete MR556 upper receiver with M-Lok forearm
- MR556 Bolt group Complete
- Tungsten Filled HK Buffer
- HK Buffer Spring
- One 30 Round HK Steel Maritime Magazine
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I love it. 560 rounds no jams. Finally got Geissele SSA and SMR parts and an ACOG. We shot dime size...
I love it. 560 rounds no jams. Finally got Geissele SSA and SMR parts and an ACOG. We shot dime sized groups out at 50 meters with mk262. Get this... With a HOT barrel 160 rounds later. It was still doing 2-3? groups at 202 yards. Please stock more soon.