H&K Heckler & Koch

H&K HK MR556 A4 13.4" Handguard This handguard is expertly engineered for precision and adaptability, featuring a robust Picatinny rail at the 12 o'clock position that guarantees seamless...

HK MR556 A4 Operator's Manual Official operator's manual for the HK MR556 A4, covering function, maintenance, and safety procedures.

H&K Heckler & Koch MR556 Upper Receiver Kit A4 -11″ - M-LOK  This kit includes a complete upper receiver/barrel assembly, allowing Mil-Spec 5.56mm AR-style rifles to be retrofitted...

H&K MR556 A4/416 A5 Gas Block Spring German-made gas block spring for the MR556 A4 and HK416 A5. Compatible With: HK MR556 A4 HK416 A5

HK MR556 16" Complete Upper Barrel Factory HK MR556 16" barrel, complete with a factory-installed barrel nut, gas block and flash hider. Every component is brand new and meticulously crafted,...

H&K MR556 Slimline Barrel, 16.5" Genuine HK MR556 Slimline 16.5" Barrel.  Non-chrome-lined for match accuracy. Compatible With: HK MR556

HK German Stripped HK MR556 Upper Receiver New factory German incomplete and unmarked MR556 upper receiver. Compatible With: HK MR556 HK MR223 HK 416 Do you need a matching lower for your...

HK MR556 Operator's Manual

H&K HK MR556 Receiver Take Down Tool This part is the tool used to tighten down the stock movement on the E1/E2 stock. Each tool will be stored in the rear of the E1/E2 stock...

HK 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 MR556 HK MR223 HK 416*** Need a...

New HK German Partially Pre-Assembled MR556/MR223 Upper Receiver Each unit comes just as shown with the F/A (forward assist) assembly and ejection port door assembly installed from the HK factory...

H&K HK MR556/MR762 Buttstock Release Lever Compatible With: HK MR556 HK MR762