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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HK91, G3, HK33, HK93 Grip for Metal Frames - OD Green - Surplus
H&K Heckler & Koch
$9.95H&K HK G3, HK 91 Grip for Metal Frames - OD Green - Surplus Used in surplus condition. Each item is used in good shape and will clean up nicely with a little bit of TLC and some attention. A great value for the price. Compatible...HKP-16333$9.95 -
HK MP5 Magazine Spring - 30 Round
H&K Heckler & Koch
$6.95HK MP5 30 Round Magazine Spring - German The MP5 30-round spring is a must-have replacement spring for all HK MP5 curved magazines. HK factory springs have been known to help cure worn, weak, or aftermarket magazine springs that do not feed well and...HKP-00089$6.95 -
HK USP, HK45C, P2000 Magazine Release - Extended
H&K Heckler & Koch
$29.95Heckler and Koch Extended Magazine Release for HK45C, HK USP, and HK P2000 This mag release makes it possible to release the magazine without changing the position of your grip. Compatible With All HK Pistols In All Calibers 45, 40, 357, &...HKP-01669$29.95 -
HK MP5 .22LR Drum Magazine - 50 Round - Translucent
BDM Black Dog Machine
$99.95HK MP5 .22 50 Round Drum Magazine For The MP5-A5 & MP5-SD .22 Rifle Made in the USA by BDM exclusively for HK Parts. Using an existing drum model that is tried and true. Compatible With: HK, Walther, Umarex MP5 & MP5SD .22 rifles. MP5...HKP-16235$99.95 -
On Sale
HK416, Colt M4 Spring Kit - .22LR - Match Trigger Upgrade
HKP HK Parts
Now: $13.95Was: $17.49HK 416 .22 & Colt M4 .22 Match Trigger Spring Kit - Set of 3 Enhanced Springs: The HKP match trigger spring kit delivers a lighter, smoother, and crisper trigger pull translating to on-target accuracy. Lower your pull weight by ~ 3lbs courtesy...HKP-17340Now: $13.95Was: $17.49 -
On Sale
HK MP5 Folding Brace
SB Tactical
Now: $99.95Was: $119.95SB Tactical Side Folding Brace for the HK MP5 and SP5 model SBT5A Features: Each brace comes assembled ready to install no assembly required Made in the USA B&T inspired design & styling The finest folding pistol brace option for your HK MP5...HKP-18017Now: $99.95Was: $119.95 -
On Sale
HK MP5 Optic Mount - Trijicon RMR, Holosun, Swampfox
HKP HK Parts
Now: $77.95Was: $97.95HKP HK Parts HK MP5 Mount - Optic - Holosun, RMR Quickly attach any RMR pattern red dot sight to your MP5 platform firearm with the HKP optic mount. Our 3-piece mount installs securely to the receiver and co-witnesses with the factory iron...HKP-20731-MNow: $77.95Was: $97.95 -
On Sale
HK Gen 1 Spring Upgrade - Roller Retainer Plate
HKP HK Parts
Now: $7.95Was: $9.95HKP 1st Gen Roller Retainer Plate To Spring Upgrade This action 3 roller retainer spring for all 1st Generation bolt heads replaces the oval-shaped roller retainer plate. HK made a wire spring as an upgrade for later production bolt heads to improve the...HKP-02119Now: $7.95Was: $9.95 -
On Sale
HK MP5, MP5K Optic Mount - Picatinny
MI Midwest Industries
Now: $71.95Was: $80.95MI Midwest Industries HK MP5, MP5K Mount - Scope - 9mm - Picatinny Rail Specifications: Easy no gunsmith install, all tools included Allows the user to mount an optic and a light or laser while retaining the factory handguard Patent-pending rock-solid...HKP-19368Now: $71.95Was: $80.95 -
HK P30, P2000, HK45, USP Flat Sear Spring - Enhanced Match
H&K Heckler & Koch
$9.95Enhanced Match Flat Sear Spring The nickel-plated sear spring is also regarded as a "match" flat spring as it will improve the feel and "smoothness" when pulling the trigger as it takes up some of the gritty feel. It is a must-have upgraded part to...HKP-01811$9.95 -
On Sale
HK MP5, SP5K Magazine Loader and Unloader - Curved 9mm
Maglula
Now: $26.95Was: $29.95Maglula Mag Loader/Unloader When using this part, the magazines can be loaded in 1/3 (60% less) of the time than loading by hand; this equates to more time shooting and less time loading. Features: Easy to use (step-by-step instructions included) Loads...HKP-14546Now: $26.95Was: $29.95 -
HK91, G3 Ejector Lever - Used
H&K Heckler & Koch
$3.95.308 Ejector Lever - Used In perfect working order, pulled from surplus HK German G3's. Compatible With: HK G3 HK 91 PTR-91 HK 51HKP-01738$3.95