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 VP9, VP9SK, VP40 Slide Release Spring
H&K Heckler & Koch
$9.95H&K VP9/VP9SK, VP40 Slide Release Pressure Spring Pressure Spring for Slide Release HK VP9, HK VP40. Compatible With: HK VP9 HK VP9SK HK VP9A1 F, VP9A1 K HK VP40HKP-16788$9.95 -
HK91, G3, PTR Magazine - 20 Round - Aluminum - Rheinmetall - Used
Rheinmetall
$12.95Rheinmetall HK G3, HK91, & PTR91 - 20 Round Magazine - Used Perfect for your HK G3/PTR style firearm. The G3 alloy mags were made for the German Army and are no longer in production. Once they are gone, they are gone for good. LAST CALL! Compatible...HKP-21840$12.95 -
HK MP5, MP5K, SP5, SP5K Magazine - 30 Round - LEO Marked
Zenith
$52.95Zenith 30 Round HK MP5 Magazine - LEO Marked Replica LEO laser markings that closely resemble those found on factory magazines. These markings are expertly lasered onto Zenith magazines, successfully emulating the sought-after LEO markings of authentic...HKP-21612-M$52.95 -
HK/HKP 22 Round HK USP45/Mark 23 .45 Complete Magazine
HKP HK Parts / Heckler & Koch
$149.95Mark 23/USP .45 - 22 Round Magazine Complete HK Parts takes an existing 12 round mag the +10 mag extension and assembles them into a working 22 round magazine. This offering is a valuable option for those that need a backup ultra capacity magazine...HKP-21372-M$149.95 -
HK MP5 Receiver Flat - 9mm - US Made
LSC
$199.95MP5 Receiver Flat - LSC LSC HK MP5 receiver flat is the most in spec flat that has ever been available. The best option for your HK German parts kit build. This flat is considered by many to be most sought after HK flat available on the market and...HKP-20555$199.95 -
HK MP5 .22 Sling Clip Kit
HKP HK Parts
$24.95HKP HK MP5 .22 Sling Clip Kit Each unit will fit all models of the MP5 .22 that have the 3 mounting holes on the left side of the magwell. This item installs in a few mins and comes complete with all you need for the install. With the addition of this...HKP-15706$24.95 -
Meprolight HK USP Fully Adjustable Tactical Night Sight Set - Green
Meprolight
$149.99Meprolight HK USP Fully Adjustable Tactical Night Sight Set - Green Meprolight Tritium night sights for HK USP pistols are fully adjustable and the recommended tactical night sight of choice. The front and rear sight have tritium green dots and a raised...HKP-01721$149.99 -
HK UMP Lower - SF FBI 0,2 - Safe, Semi
HKP HK Parts
$495.99New HK Parts -UMP Safe, Semi FBI (0,1) Lower Each lower comes complete with 2 position settings (S, F) and all the internals. This item is ideal for the USC to UMP conversion or to keep as a spare. Compatible With: UMP .45 UMP .40 UMP 9mm USC...HKP-00590$495.99 -
HK Mark 23 Optic Plate - Holosun, RMR - Red Dot Pistol Mount
HKP HK Parts
$99.95HKP HK Mark 23 RMR Optics Plate The finest Red dot mounting solution for your HK MK23. New optic plate that replaces your rear sight to allow a Red dot optic to mount on your Mark 23 slide. A quick and easy install that can be done in the matter of...HKP-21415$99.95 -
AR-15 Buffer Tube - Mil-Spec
HKP HK Parts
$29.95Mil-Spec US-Made Buffer Tube Compatible With: All AR-15 style platforms Not correct length for HK rifles Features: Made from T7 7075 aircraft grade aluminum 6-position Made in the USA Each features a highly polished inside tube Black mil-spec triple...HKP-02727$29.95 -
Picatinny Rail for HK Receivers - 13 Slot
HKP HK Parts
$52.95HKP Picatinny Rail For HK Receivers - 13 Slot Mil-Spec all steel CNC'ed picatinny rail in the white, relief cut to fit flush and low profile on HK receivers. The most solid and consistent mounting platform made for mounting scopes and optics to HK builds...HKP-18238$52.95 -
HK MP5SD Locking Piece - 115 Degree - 9mm
RCM
$33.95RCM MP5SD 9mm Locking Piece - 115 Degree This locking piece is a US-made version of the factory German MP5SD 115-degree locking piece. Each locking piece is made 100% here in the USA from ordnance grade steel, heat treated, and made to last...HKP-02192$33.95