HK416 / MR556 Receivers / Uppers
Upgrade the core of your HK MR556 or HK416. Choose from genuine HK receivers, complete upper receiver groups, and stripped uppers for custom builds.
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On Sale
HK416 A5 Stripped Upper Receiver - RAL8000
H&K Heckler & Koch
Now: $1,403.96Was: $1,559.95HK German Un-Assembled - Stripped HK416 A5 Upper Receiver - RAL 8K Brand new factory German RAL 8000 HK416A5 upper receiver. Compatible With: HK416 HK MR556 HK MR223 Looking for a matching lower for your build? STS416 A5 LOWER - Specialized...Now: $1,403.96Was: $1,559.95 -
On Sale
HK MR556 A4 Complete Upper - F/A & Ejection Door
H&K Heckler & Koch
Now: $761.36Was: $845.95H&K HK MR556 A4 Complete Upper w F/A Ejection Door The H&K MR556 A4 Complete Upper is a superior factory assembly that comes fully equipped with a forward assist and an ejection port door, providing unparalleled reliability and precision. This...Now: $761.36Was: $845.95