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 MR556 A4 Hammer Spring
H&K Heckler & Koch
$5.95H&K MR556 A4 Hammer Spring Genuine H&K hammer spring for the MR556 A4. Compatible With: HK MR556 A4HKP-22083$5.95 -
HK Hammer and Pressure Shank Pin - 90 Series
H&K Heckler & Koch
$3.95H&K Hammer and Pressure Shank Pin - 90 Series For pinned-style hammer and shanks, this pin securely holds the two components together. This original H&K production part has never been installed. Made from correct German-spec steel to meet exact...HKP-21854$3.95 -
On Sale
HK UMP, USC 4 Piece M-Lok Set - Anodized
HKP HK Parts
Now: $99.95Was: $149.95HKP HK UMP/USC 4 Piece M-Lok Set - Anodized Upgrade your UMP and USC with the HK Parts 4-piece M-Lok set, designed to eliminate the hassle of snagging and shredding your knuckles on Picatinny rails. This exceptional set significantly expands the...HKP-21663-MNow: $99.95Was: $149.95 -
Out Of Stock
HK MP5, HK94 Buttstock - A3 - Factory - Used
H&K Heckler & Koch
$739.95H&K Heckler and Koch Factory A3 Used Buttstock for HK MP5 and HK94 The original Navy-style German HK MP5 A3 stock is a rare find as it's no longer in production and has been replaced by the MP5 F-style stock. We are offering the sought-after...HKP-21644$739.95 -
HK45 +5 E2 Magazine Extension Kit
HKP HK Parts
$64.95HKP HK45 +5 E2 Magazine Extension Kit Our HK45 E2 design boldly transforms our magazine extension, giving it an aggressive look along with superior functionality. The enhanced features throughout the extension provide not only the striking appearance we...HKP-21627-M$64.95 -
On Sale
HK VP9L Railok™ Threaded Barrel Compensator - BLEMISHED
HKP HK Parts
Now: $94.95Was: $189.95HK Parts Railok™ Mounting System Threaded Barrel Compensator: H&K VP9L COSMETICALLY BLEMISHED PARTS ARE FULLY FUNCTIONAL AND SOLD AS IS. THIS PART IS NOT ELIGIBLE FOR RETURN. ALL BLEMISHED PART SALES ARE FINAL. The HK Parts Railok™...HKP-21263-BNow: $94.95Was: $189.95 -
B&T Unigrip QD with Bipod
B&T Brugger & Thomet
$198.95B&T Unigrip QD with Bipod This B&T foregrip features a retractable bipod for superior weapon stability in both the standing and prone positions. Specifications: Condition: Factory new Material: Polymer/alloy Heat deflection temperature:...HKP-21387-M$198.95 -
On Sale
HK VP9 Rail Mount Compensator - OD Green
HKP HK Parts
Now: $134.95Was: $169.95HKP HK VP9 Rail Mount Compensator - OD Green *DO NOT USE COMPENSATOR WITH A THREAD PROTECTOR INSTALLED ON THE BARREL. Doing so will result in damage to your firearm and compensator.* Specifications: Length - 4 1/4 inches Height - 2 1/2...HKP-20987Now: $134.95Was: $169.95 -
Out Of Stock
HK UMP .40 - 30 Round Magazine - Used
H&K Heckler & Koch
$49.9530 Round Magazine – Used – UMP .40 S/W This magazine will fit all HK UMP .40 caliber UMP’s as well as the USC-UMP .40 caliber conversions. Used factory HK magazine. Compatible With: HK UMP .40 HK USC-UMP conversions LWRC SMG.40HKP-20816$49.95 -
On Sale
HK VP40 Holster - Appendix IWB
Odin Holsters
Now: $37.46Was: $79.95Odin Hoslters HK VP40 Appendix IWB Holster This is an inside the waistband holster. Each holster is made by hand and is made for use with the HK VP40. Custom molded using a vacuum former for perfect fit and adjustable retention. Great for long days at...HKP-19656-MNow: $37.46Was: $79.95 -
Out Of Stock
HK417, MR762, G28 Magazine Release - Ambidextrous
KDG Kinetic Development Group
$169.95Magazine Release - Ambi - HK MR762, 417, G28 The HK 762 Ambi (Ambidextrous) Magazine Release. This is the first ambidextrous magazine release for the HK 417 variant rifles. The mag release is a lever instead of a button; where the release has been...HKP-19204$169.95 -
Out Of Stock
HK UMP Grip Wrap - Kydex
Solar Tactical
$89.95Solar Tactical HK UMP Kydex Grip Wrap Featureless Kydex grip wrap for use with detachable magazines. Prevents a wrap-around style pistol grip. Allows the use of the factory magazine release and detachable magazines over 10rds. Preban hi-capacity...HKP-19142$89.95