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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Out Of Stock
HK G36, SL8 Single Optic Carrying Handle - Used
H&K Heckler & Koch
$0.00HK German G36, SL8 Single Optic Carrying Handle In Used Shape.HKP-00806$0.00 -
Out Of Stock
HK USC Magazine Release - Extended
HKP HK Parts
$24.95HKP HK Parts Alloy Extended Magazine Release for HK USC Billeted alloy USC magazine release. This is a very common repair and replacement part as they are fairly easy to break on the USC lower. With...HKP-17918$24.95 -
Out Of Stock
HK UMP, USC Extractor - .40 S&W
USA
$39.95New US-Made USC Or UMP .40 Extractor This part is a repair and replacement item, as these are prone to breakage, and it's a part that's hard to find and a great item to have on hand. Please Note: HK...HKP-02624$39.95 -
Out Of Stock
HK UMP Pistol Grip, Incomplete - 0,1,2,F
H&K Heckler & Koch
$0.00Stripped UMP Pistol Grip - 4 Position (0,1,2,D) PictogramHKP-17817$0.00 -
Out Of Stock
HK UMP Pistol Grip, Incomplete - 0,1,F
H&K Heckler & Koch
$0.00UMP Pistol Grip Stripped & Incomplete - 3 Position (0,1,F) Pictogram New German HK UMP 3 position lower.HKP-17816$0.00 -
Out Of Stock
HK UMP Pistol Grip, Incomplete - 0,1
H&K Heckler & Koch
$0.00UMP Pistol Grip Stripped & Incomplete - 2 Position (0,1) Pictogram New HK German manufacture, rare and hard to find. If you have an HK USC you can use this housing with the USC lower internals for a...HKP-17815$0.00 -
Out Of Stock
HK UMP Rear Receiver Section - Demilled
H&K Heckler & Koch
$0.00HK UMP Demilled Receiver Section This is a demilled factory HK UMP rear receiver section that is perfect for the new Tom Bostic USC-UMP conversions. This section is the perfect length in order to do...HKP-01659$0.00 -
Out Of Stock
HK UMP Parts Kit - 9mm
H&K Heckler & Koch
$0.00HK Heckler and Koch 9mm Parts Kit in Like New Condition for HK UMP Click this link to complete your build with an S5 Tactical receiver. Black OHKP-02425$0.00 -
Out Of Stock
HK UMP, USC Kit - Caliber Conversion - 9mm - 30 Round
HKP HK Parts
$999.95HK Parts and Heckler and Koch HK UMP and HK USC 9mm Conversion Kit - Threaded Barrel 1/2x28 - 3-Lug This UMP, USC conversion kit will convert existing conversions to 9mm. This is a simple drop-in...HKP-02285$999.95 -
Out Of Stock
HK UMP Barrel - 9mm - Standard
HKP HK Parts
$299.95HK UMP 9mm Barrel US made replica of the HK UMP 9mm barrel. Counts as one US made compliant part as an added bonus.HKP-18640$299.95 -
Out Of Stock
HK UMP Bolt Group - Semi Auto - 9mm
HKP HK Parts
$369.95HK UMP 9mm -Semi-Auto Bolt Group The semi-auto bolt group is required for HK USC to HK UMP caliber conversions. The full-auto bolt carrier will not work in HK USC rifles. Includes: ExtractorHKP-18752$369.95 -
Out Of Stock
HK UMP Paddle Magazine Release
USA
$9.95US Made Paddle Magazine Release for HK UMP New UMP Mag release. This is a very common repair and replacement part as they are fairly easy to break on the UMP lower. Simple and easy to install no...HKP-18773$9.95