Parts
At HK Parts, we offer a wide range of high-quality Heckler and Koch accessories and components for your favorite firearms. Whether you are upgrading a Heckler and Koch pistol or rifle, or building with parts kits, we have you covered. Explore top-rated components for VP9, USP, P30, MP5, MP5K, G36, HK416, and more. From triggers, barrels, and grips to magazines, stocks, and sights, find the parts you need to enhance performance, reliability, and function.
Popular upgrades include match triggers, threaded barrels, compensators, optic plates, and extended magazines. Rifle owners often add enhanced stocks, forearms, and ambidextrous controls.
MP5 and MP5K kits are top sellers, giving shooters authentic components for iconic builds. G36 and HK416 kits are also highly sought after by collectors and professionals alike.
HKP offers the world’s largest H&K-focused catalog, with better availability, faster fulfillment, and expert support compared to general retailers.
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HK MP5 Rear Receiver Section
H&K Heckler & Koch
$14.95H&K MP5 Rear Receiver Section HK German demilled receiver section with rear sight base as installed at the factory. MP5 & HK94 Factory HK rear sight bases (portion welded to MP5 receiver), you get...HKP-02167$14.95 -
HK416 Compensator - PWS FSC556 Tactical
PWS Primary Weapon Systems
$89.95FSC556 Tactical Compensator (Muzzle Brake) Compensator The PWS FSC556 has the very best compensation and decrease in muzzle rise. Combine that with enough flash suppression to keep the flash out of...HKP-01647$89.95 -
HK G3 A2 Adjustable Stock Extension
USA
$69.95HK G3 A2 Adjustable Stock Extension Each stock extension is adjustable in 1/2" increments to enable you to achieve the proper length of trigger pull. This allows you a full 1.50" in length...HKP-00872$69.95 -
HK VP9CC Magazine - 10 Round
H&K Heckler & Koch
$58.95Heckler and Koch VP9CC Magazine 10 Round Factory HK German VP9CC 10-round magazine Compatible With: VP9CC 9mmHKP-22568$58.95 -
On Sale
HK G36 Folding Stock or Brace - HDA3
Haga Defense
Now: $314.96Was: $349.95HK G36 Folding Stock or Brace - HDA3 The HDA3 is a modular, USA-made stock or brace system developed by Haga Defense and A3 Industries. Built for strength, adaptability, and cross-platform...HKP-22357-MNow: $314.96Was: $349.95 -
HK CC9 Magazine Floorplate - 9mm - Flat
H&K Heckler & Koch
$5.95H&K CC9 Flat Magazine Floor Plate OEM floor plate for HK CC9 magazines. Direct replacement for standard or extended floor plates. Compatible With: HK CC9HKP-22153$5.95 -
On Sale
HK MP5 Trunnion - Gunsmith Special
USA
Now: $24.95Was: $54.95HK MP5 Trunnion - Gunsmith Special US made HK MP5 trunnions sold as-is. Will require work before being functional. We recommend the work be performed by a professional gunsmith. The condition will...HKP-99089Now: $24.95Was: $54.95 -
On Sale
HK53 Cocking Tube Style
USA
Now: $59.96Was: $149.95HK53 Cocking Tube Style US made cocking tube perfect for an HK53-style build or for use on a custom build Compatible With: HK53HKP-99057Now: $59.96Was: $149.95 -
Out Of Stock
HK417, MR762 Buttstock - M110A1, G28 SDMR Clone - RAL8000
H&K Heckler & Koch
$489.95HK Heckler and Koch M110A1 G28 SDMR Stock in RAL 8K for HK417 This exceptional stock is the definitive choice for your M110A1, G28 SDMR clone, or any custom build! With its HK E1 Mil-Spec style...HKP-21675$489.95 -
B&T APC Takedown Pin - Front
B&T Brugger & Thomet
$11.95B&T APC Takedown Pin - Front Factory B&T front take down pin for the APC receiver. Compatible With: APC Series Standard receiverHKP-21737$11.95On Sale
HK416, MR556 Barrel - 5.56 - 14.5" - Threaded 1/2"x28- A3 - Light
Nefarious Arms
Now: $535.46Was: $594.95Nefarious Arms HK 416/MR556 14.5" A3 Barrel Each Nefarious Arms barrel is cold-hammer-forged and chrome-lined for years of accurate shooting. Grab this expertly crafted barrel for your next SBR or...HKP-21589Now: $535.46Was: $594.95Out Of Stock
HK G36 IDZ Concave Stock
H&K Heckler & Koch
$386.95H&K G36 IDZ Stock Concave When it comes to adjustable, folding G36 stocks, the IDZ tops the list. German made by HK with a concave buttpad for reliability and comfort. Features: 3 position fHKP-21501$386.95