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 CC9 Slide Release
H&K Heckler & Koch
$46.95Heckler and Koch Slide Release for HK CC9 Factory slide release manufactured by Heckler and Koch for the CC9 platform. Allows manual release of the slide and engages the slide stop after the last round when used with an empty magazine. Compatible...HKP-22124$46.95 -
HK91, G3, HK33, HK53, HK93 Paddle Magazine Release - Anti-Rattle - USED
H&K Heckler & Koch
$42.95Heckler and Koch Anti Rattle Paddle Magazine Release for HK91, HK G3s and HK33, HK53, HK93 - USED This is a used German anti-rattle paddle mag release for installation on all Heckler and Koch Firearms .223 and .308 rifles. Compatible With: HK91,...HKP-22061$42.95 -
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 ejection port door, providing unparalleled reliability...HKP-21929$845.95 -
On Sale
HK MP5K Folding Stock with Adapter - .40 S&W, 10mm
HKP HK Parts
Now: $191.95Was: $239.95HKP HK MP5K .40,10mm Folding Stock with Adapter Genuine H&K UMP folding stock completely assembled with the HK Parts stock adapter. CNC machined aircraft grade aluminum with QD sling attachment point. Available exclusively at HK Parts. Compatible...HKP-21893Now: $191.95Was: $239.95 -
On Sale
B&T APR308 Deployment Bag - With Sling
B&T Brugger & Thomet
Now: $199.95Was: $349.95B&T APR308 Deployment Bag - With Sling Hidden for years in an unmarked crate, these genuine B&T contracted deployment cases are perfect for keeping your valuable B&T APR rifle safe and secure. The cases were made in Poland by NFM Group...HKP-21881Now: $199.95Was: $349.95 -
On Sale
HK G3K, HK33K Flash Hider - 4 Prong - Open
RCM
Now: $158.95Was: $187.95RCM HK G3K/HK33K Flash Hider - 4 Prong - Open The RCM G3K and HK33K flash hider can be welded to a 12.69" barrel to achieve a non-SBR OAL of 16 plus inches or add to any other configuration. Made in the US from ordnance grade steel and counts as 1 922r...HKP-21599Now: $158.95Was: $187.95 -
On Sale
HK MP5F, MP5 40, 10 Cocking Handle - BLEMISHED
H&K Heckler & Koch
Now: $38.95Was: $85.99H&K MP5F & MP5 40/10mm Cocking Handle - BLEMISHED 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 factory correct cocking handle. Each unit...HKP-00098-BNow: $38.95Was: $85.99 -
On Sale
HK MP5 Buttstock Locking Lever - USED
H&K Heckler & Koch
Now: $59.95Was: $89.95H&K MP5 Stock Locking Lever - USED USED PARTS ARE FULLY FUNCTIONAL AND SOLD AS IS. THIS PART IS NOT ELIGIBLE FOR RETURN. ALL USED PART SALES ARE FINAL. Compatible With: MP5 (NOT compatible with MP5 .22 LR)HKP-02560-BNow: $59.95Was: $89.95 -
On Sale
HK MP5, HK94, SP5 Binary Trigger Housing - Ambi - BFSIII - 9mm - INCOMPLETE - BLEMISHED
FA Franklin Armory
Now: $599.95Was: $849.95HK MP5, HK94, SP5 Binary Trigger Housing - Ambi - BFSIII - 9mm - INCOMPLETE - BLEMISHED ONLY 1 UNIT AVAILABLE - AS PICTURED INCOMPLETE - MISSING GRIP COSMETICALLY BLEMISHED PARTS ARE FULLY FUNCTIONAL AND SOLD AS IS. THIS PART IS NOT ELIGIBLE FOR RETURN...HKP-20642-BNow: $599.95Was: $849.95 -
On Sale
HK SIG P320C Compensator - BLEMISHED
HKP HK Parts
Now: $124.95Was: $189.95HKP SIG P320C Compensator - BLEMISHED ONLY 1 UNIT AVAILABLE - AS PICTURED DINGS COSMETICALLY BLEMISHED PARTS ARE FULLY FUNCTIONAL AND SOLD AS IS. THIS PART IS NOT ELIGIBLE FOR RETURN. ALL BLEMISHED PART SALES ARE FINAL. Our P320 P320C compensator...HKP-21092-BNow: $124.95Was: $189.95 -
On Sale
HK UMP Extended Top Rail - Red
HKP HK Parts
Now: $47.95Was: $59.95HKP HK UMP Extended Top Rail - Red Nearly an 1" longer than the standard length top rail. This picatinny top rail allows the user to add an eotech, aimpoint, acog, etc. Made in the USA from aluminum material and hard coat anodize in a beutiful Red...HKP-21049Now: $47.95Was: $59.95 -
Out Of Stock
HK USP Holster - Comp Carry RH - 9mm, .40 S&W, .45 ACP
Comp-Tac
$79.95Rail Mount Compensator & Comp Weight™ Compensator International Holster – Right Hand for HK USP .45/.40/9mm At last a custom made Comp-Tac International OWB holster for your HK pistol that allows you to have the Rail Mount Compensator,...HKP-20976$79.95