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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HK416 Upper Receiver Kit - 10.4" - 5.56
HKP HK Parts
$2,485.95HKP 416 10.4" 5.56 Complete Upper Kit Complete Each kit includes the complete upper assembly, bolt group, tungsten buffer, & high-reliability SS recoil spring. This upper kit is a complete gas piston HK 416 style upper assembly that will drop on your...HKP-17662$2,485.95