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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Out Of Stock
HK416 Upper Receiver Kit - 11.5" - 5.56
HKP HK Parts
$2,485.95HKP HK 416 11.5" 5.56 Complete Upper Kit Complete This top-tier assembly seamlessly fits onto your mil-spec lower or an STS 416 lower, providing the perfect solution for those seeking an 11.5" 416 style upper without breaking the bank. Each unit is...$2,485.95 -
Out Of Stock
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...$2,485.95 -
Out Of Stock
HK416C Upper Receiver Kit - 9"
HKP HK Parts
$2,799.95HK416C Complete Upper Kit - 9" Our complete 416C upper kit includes everything you need to pair with a mil-spec lower or an STS 416C lower. For that genuine look, the STS 416C lower with the correct 416C stock eyelets is as good as you can get...$2,799.95 -
On Sale
HK416 A1 Upper Receiver - 10.4"
H&K Heckler & Koch
Now: $2,999.95Was: $3,499.95Heckler and Koch's 10.4" Complete Upper Receiver Kit for your HK416 Features: Factory German 10.4" length (2008) date coded P.D trade-in de-serialized during the de-milling process. Finish your build with a matching lower from STS...Now: $2,999.95Was: $3,499.95