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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On Sale
HK Gen 1 Spring Upgrade - Roller Retainer Plate
HKP HK Parts
Now: $7.96Was: $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...Now: $7.96Was: $9.95 -
On Sale
HK MP5 Folding Brace
SB Tactical
Now: $89.95Was: $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...Now: $89.95Was: $119.95 -
On Sale
HK MP5, MP5K Optic Mount - Picatinny
MI Midwest Industries
Now: $72.86Was: $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...Now: $72.86Was: $80.95 -
On Sale
HK MP5 .22LR Drum Magazine - 50 Round - Translucent
BDM Black Dog Machine
Now: $89.95Was: $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...Now: $89.95Was: $99.95 -
On Sale
HK MP5, MP5K Extractor - 9mm
H&K Heckler & Koch
Now: $59.36Was: $65.95New HK German HK 9mm Extractor - Latest Generation This is the latest and greatest HK MP5 (newest F style version) German extractor. Each unit works with all HK MP5, HK94, HK MP5K, HK SP89, HK SP5K, or other 9mm clones. A great part to have as a spare or...Now: $59.36Was: $65.95 -
On Sale
HK MP5 Optic Mount - Holosun, RMR
HKP HK Parts
Now: $78.36Was: $97.95HKP HK Parts HK MP5 Mount - Optic - Holosun, RMR The finest mounting solution to properly mount your RDS on your MP5 or any other receiver that utilizes the same style mounting system. With our 3 piece optic mount, it makes installation a breeze. No...Now: $78.36Was: $97.95 -
On Sale
HK MP5, MP5K Ejector Lever - 9mm
MKE
Now: $17.95Was: $19.95MKE HK MP5/K 9mm Ejector Lever Upgrade or replace your worn ejector lever with this quality part, made for HK MP5 and MP5K 9mm models. Whether you're finishing a build or refreshing your setup, this piece helps keep your firearm running. Compatible...Now: $17.95Was: $19.95 -
On Sale
HK Rifle Extractor Spring - FMP
H&K Heckler & Koch
Now: $3.14Was: $3.49HK Parts contracted with FMP to bring you this Rifle Extractor Spring Features: New FMP contract The extractor spring is the number one replaced item on HK firearms. Many HK gunsmiths recommend upgrading HK94, HK MP5 series HK's with a longer stronger...Now: $3.14Was: $3.49 -
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 51$3.95 -
On Sale
HK45, USP Spring - Flat Sear - Match - Enhanced
H&K Heckler & Koch
Now: $8.96Was: $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...Now: $8.96Was: $9.95 -
On Sale
Maglula MP5/SP5 Magazine Loader/Unloader
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...Now: $26.95Was: $29.95 -
On Sale
HK VP9, HK P30 Magazine - 20 Round - 9mm
H&K Heckler & Koch
Now: $53.10Was: $59.00HK VP9 &P30, P30L, P30S - 9mm - 20 Round Complete Magazine New HK German Manufactured & Factory Fresh Production. Each factory HK magazine holds 20 rounds for use in all VP9, P30, P30L, P30S 9mm Models. Each magazine is marked with the...Now: $53.10Was: $59.00