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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HK416, HK417 Buttstock Release Lever
H&K Heckler & Koch
$21.95Heckler and Koch Buttstock Release Lever HK416 and HK417 The buttstock release lever locks the telescopic buttstock to the tubular rear buttstock extension. The buttstock is adjustable in length in 6 positionsHKP-18948$21.95 -
On Sale
HK416 Handguard - 9" Crux KeyMod - .22LR
Strike Industries
Now: $159.95Was: $249.95Strike Industries CRUX KeyMod Handguard for HK416 .22 LR - 9 Inch Lightweight 9-inch KeyMod handguard designed for HK416, HK MR556, and HK416 .22 platforms. This rail system reduces overall front-end weight compared to the factory assembly while...HKP-17347Now: $159.95Was: $249.95 -
Out Of Stock
HK UMP, G36 Notched Disk - 3 Position - 9mm, .40 S&W, .45 ACP, 5.56 / .223
H&K Heckler & Koch
$0.00HK Ratched Wheel Notched Disk For 3 Position Lowers Compatible With: HK G36 HK UMPHKP-01854$0.00 -
HK UMP/USC (.40 S&W/.45 ACP/9mm) Rear Sight - Incomplete
H&K Heckler & Koch
$49.95H&K UMP/USC (.40 S&W/.45 ACP/9mm) Rear Sight - IncompleteHKP-16372$49.95 -
Out Of Stock
HK UMP Barrel - 9mm - 16.5 Inch
Michaels Machines
$549.95MM HK UMP (9mm) Barrel - 16.5 Inch Fluted just like the factory HK barrels with 16 flutes.HKP-02282$549.95 -
Out Of Stock
HK21E, HK23E Carry Handle
H&K Heckler & Koch
$0.00HK German HK21E, HK23E Carry Handle New HK German factory HK carry handle for the HK21E, HK23E series of firearms. This offering is the handle only. The carry handle can also be adapted to standard HK21 models as well as the following firearms. HK21...HKP-00576$0.00 -
PTR PDW Barrel - 7.62 / .308 - 9" - SBR
PTR
$189.99PTR PDW .308 Pistol or SBR Barrel- USA This part comes new in the white, never installed, and ready for the HK project. Features: Just under 9" inches long 1:10 twist U.S. made barrel counts as one 922r compliant part Please Note: Front sight towers...HKP-02788$189.99 -
Out Of Stock
HK PTR-32 Bolt Group - Complete - PDW
HKP HK Parts
$379.95US Made PTR 32 PDW Bolt Group Complete Semi-Auto. Factory correct bolt head and locking piece for use in the PTR 32 chambered in 7.62X39. Brand new May 2015 manufacture. This is the correct bolt for all PTR PDW with 8" barrels.HKP-17387$379.95 -
HK53 Frangible Ammunition Adapter - 15x1
H&K Heckler & Koch
$149.95New HK 53 Factory 4 Prong Frangible Ammunition Adapter - 15x1 RH Get your hands on one of the last HK factory frangible adapters while we still have remaining inventory of this limited item. This part is no longer in production so once they are...HKP-16978$149.95 -
HK MP5K Bolt Carrier - Full Auto - .40 S&W / 10mm
RCM
$157.95MP5K 40/10 Full Auto Bolt Carrier - Latest Upgraded Version This part is built from billet ordnance steel. This US-made MP5K 40,10 style carrier is made with Tungsten and is heat-treated, providing the finest American-made carrier...HKP-01826$157.95 -
HK MP5 Parts Kit - .40 S&W
HKP HK Parts
$2,959.95HK MP5 .40 Pistol German Parts Kit - Used. Genuine German HK MP5 40 parts kit in the pistol configuration Includes: Barrel - 3 lugged & threaded, cold hammer-forged Trigger Group - Ambidextrous Navy 0,1, F Trigger Group or SEF Navy your choice A1...HKP-16719$2,959.95 -
HK MP5 German Parts Kit - .40 S&W - A2 Stock
HKP HK Parts
$3,979.95HK MP5 40 S&W A German Parts Kit - Used Includes: Barrel - 3 lugs, threaded, and cold hammer-forged Trigger Group - Ambidextrous Navy 0,1, F Trigger Group A2 Fixed Stock Bolt Group Mp5 40 F/A Forearm - Standard wide black polymer Rear Sight...HKP-00891$3,979.95