HK416 / MR556 Receivers / Uppers

HK German Un-Assembled/Stripped HK MR556/MR223 A5 Upper Receiver Factory HK MR556 A5 upper receiver. This is the semi-auto MR556 variant. Compatible With: HK MR556

HK MR556, HK 416 E1/E2 Charging Handle - Incomplete New HK German manufactured HK MR556, HK 416. A great item to have on hand in the event of breakage or high wear. Compatible With: HK MR556<

HK Heckler and Koch A4 Complete Upper with Full Auto Ejection Door for HK MR556 The HK MR556 A4 Complete Upper is a superior factory assembly that comes fully equipped with a forward assist and an...

Heckler and Koch HK 416 and HK MR556 Assembly Wrench Tool Factory HK German multi-tool for the HK416 and MR556. The perfect tool for a complete breakdown. 

HK 416, MR556 & MR762, HK 417 - Buffer Staking Tool - German HK Rare HK factory HK staking tool for the castle nut to be staked. These took over 3 years to get and offered for cost while supplies...