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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HK417, MR762 Buffer Tube Castle Nut
H&K Heckler & Koch
$44.95Heckler and Koch Castle Nut for Receiver Extension for Buffer Tube for HK417 and MR762 New HK German manufacture and the factory correct offering with the proper installation screws and staking...HKP-16768$44.95 -
Out Of Stock
HK416, MR556 Forward Assist Plunger Pin
H&K Heckler & Koch
$9.95Heckler and Koch HK MR556/416 Forward Assist Plunger PinHKP-17542$9.95 -
Out Of Stock
HK416, MR556, MR762, AR-15 Take Down Pin Set - Titanium
HKP HK Parts
$29.95AR15, M4, MR556, MR762, AR10 Enhanced Take Down Pin Set Front & Rear - Titanium Custom ultra strong pure titanium front and rear take down pin set. Each set included both the front and rear pins for...HKP-17936$29.95 -
Out Of Stock
HK MR556, MR223 Upper Receiver - Forward Assist and Ejection Door
H&K Heckler & Koch
$694.95New HK German Partially Pre-Assembled Upper Receiver for HK MR556 and HK MR223 Each unit comes just as shown with the F/A (forward assist) assembly and ejection port door assembly installed from the...HKP-16950$694.95 -
HK416, MR556 Charging Handle Roll Pin
H&K Heckler & Koch
$7.95HK Heckler and Koch Clamping Sleeve or Roll Pin for Pawl on Charging Handles This is the longer one that is used on the outside of the charging handle. There are one of these pins used per charging...HKP-17063$7.95 -
HK416, MR556 Charging Handle Release Latch
H&K Heckler & Koch
$39.95Heckler and Koch HK MR556/416 Charging Handle Release Latch Perfect replacement item for the MR556 and HK 416 charging handle. New HK German manufacture. These can become chewed up and damaged with a...HKP-16553$39.95 -
HK416, MR556 Charging Handle Roll Pin
$7.95HK 416, MR556 Roll Pin for Charging Handle - HKP This is the shorter one that is used on the inside of the charging handle. There are two of these pins used per charging handle.HKP-16536$7.95 -
Out Of Stock
HK416, MR556 Upper Receiver - Stripped - No Forward Assist
H&K Heckler & Koch
$489.99HK416, MR556 Upper Receiver - Stripped - No Forward Assist Genuine HK HK416 upper receiver designed for HK416 and MR556 rifle platforms. This stripped receiver does not include a forward assist or...HKP-22506$489.99 -
HK416, MR556 Charging Handle - E2
H&K Heckler & Koch
$175.95Heckler and Koch E2 Charging Handle for HK416, MR556 Factory HK charging handles for the MR556, HK416 platform. The standard MR556 charging handle allows the release latch to be configured on either...HKP-22021$175.95 -
HK MR556, MR223 A5 Incomplete Upper Receiver
H&K Heckler & Koch
$489.95HK 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 MR556HKP-18785$489.95 -
HK416 E1, MR556 Charging Handle - Incomplete
H&K Heckler & Koch
$109.95HK 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<HKP-17540$109.95 -
HK MR556 A4 Upper, Complete - Full Auto and Ejection Door
H&K Heckler & Koch
$845.95HK 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...HKP-21929$845.95