All 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.
- Product
- Qty in Cart
- Quantity
- Price
- Subtotal
-
HK416, Colt M4 Spring Kit - .22LR - Match Trigger Upgrade
HKP HK Parts
$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...$17.49 -
HK Gen 1 Spring Upgrade - Roller Retainer Plate
HKP HK Parts
$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...$9.95 -
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...Now: $99.95Was: $119.95 -
HK MP5, MP5K Mount - Scope - 9mm - Picatinny Rail
MI Midwest Industries
$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...$80.95 -
BDM 50 Round HK MP5 .22LR Magazine Drum - 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...$99.95 -
HK MP5 Mount - Optic - Holosun, RMR
HKP HK Parts
$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...$97.95 -
HK MP5, MP5K Extractor - 9mm
H&K Heckler & Koch
$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...$65.95 -
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 51$3.95 -
HK Rifle Extractor Spring - FMP
H&K Heckler & Koch
$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...$3.49 -
HK45, USP Spring - Flat Sear - Match - Enhanced
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...$9.95 -
HK 20 Round HK VP9, HK P30 9mm Complete Magazine
H&K Heckler & Koch
$59.00HK VP9 &P30, P30L, P30S - 9mm - 20 Round Magazine Complete 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 factory 20...$59.00 -
MFI HK MP5/G3/93 Micro Low Mount
MFI
$110.95HKPARTS 2025 MFI Micro 1913 Picatinny Rail Scope Mount for HK MP5/94/G3/91/93 This mount allows for installation without completely removing the screws from the mounting claws. The claws can remain attached to the bolt or screw, allowing the entire...$110.95