HK416 / MR556 Receivers / Uppers

AR-15 Commercial Buffer Tube Kit Compatible With: HK MR556 & 416  All AR-15 style platforms  Includes: Made with T7 7075 aircraft-grade aluminum Made in the USA with a polished inside tube Mil-Spec triple hard coat Teflon anodized...

H&K MR556 A4 Takedown Detent Pin Factory H&K takedown pin for MR556 A4. Compatible With: HK MR556 HK 416 HK MR762 HK 417

H&K MR556 A4/416 Rear Takedown Pin Rear take down pin for MR556 and HK416 rifles.   Compatible With: HK MR556 HK 416    

H&K MR556 A4 16.5″ 5.56 M-LOK Upper Receiver Kit This kit includes a complete upper receiver/barrel assembly, allowing Mil-Spec 5.56mm AR-style rifles to be retrofitted to HK’s piston and pusher rod system. This system utilizes a piston...

H&K HK MR556, HK416 Mag Catch - Ambi Factory HK ambidextrous magazine catch/release. Compatible With: HK416 A5 HK MR556 A4 NOT compatible with earlier variants with single-side controls

H&K 416 Front Takedown Pin The 416 front takedown pin is a German-made component designed to securely fasten the upper and lower receivers. Precision-machined for a proper fit, it ensures reliable function and serves as an ideal replacement or spare...

H&K HK MR556/416 Receiver End Plate - BLEMISHED INSTALLATION MARKS. COSMETICALLY BLEMISHED PARTS ARE FULLY FUNCTIONAL AND SOLD AS IS. THIS PART IS NOT ELIGIBLE FOR RETURN. ALL BLEMISHED PART SALES ARE FINAL. New HK German manufacture. Compatible...

Heckler 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...

HKP HK 416 A1/A3, MR556 Upper Receiver Forging HK Parts' very own 416 upper receiver forging. This is the first time that these forgings have been made available to the public. Our receivers come with the ever popular Cerro Forge "keyhole" marking. Cerro...

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

H&K 416 10.4" Date Coded OTB Upper Parts Kit - USED Genuine HK 416 10.4″ date coded used upper parts kit with a factory German 10.4″ barrel with the new Over The Beach (OTB) features (vented gas block, quad rail forearm).  Finish...

H&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...