Parts

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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  • New - H&K HK 416/417 Buttstock Release Lever - HKP-18948 HK416, HK417 Buttstock Release Lever
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    HK416, HK417 Buttstock Release Lever

    H&K Heckler & Koch

    $21.95
    Heckler 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 positions
    HKP-18948
    $21.95
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    Qty in Cart: 0
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    $21.95
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  • On Sale
    New - Strike Industries HK416 .22LR Crux KeyMod 9" Handguard - Black - HKP-17347 Side profile view of the Strike Industries HK416 .22LR Crux KeyMod 9-inch handguard in black with full-length top Picatinny rail.
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    HK416 Handguard - 9" Crux KeyMod - .22LR

    Strike Industries

    Now: $159.95
    Was: $249.95
    Strike 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-17347
    Now: $159.95
    Was: $249.95
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    Now: $159.95
    Was: $249.95
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  • Out Of Stock
    New - H&K UMP/G36 (.40 S&W/.45 ACP/9mm/5.56/.223) Notched Disk - 3 Position - HKP-01854 HK UMP, G36 Notched Disk - 3 Position - 9mm, .40 S&W, .45 ACP,  5.56 / .223

    HK UMP, G36 Notched Disk - 3 Position - 9mm, .40 S&W, .45 ACP, 5.56 / .223

    H&K Heckler & Koch

    $0.00
    HK Ratched Wheel Notched Disk For 3 Position Lowers Compatible With: HK G36 HK UMP
    HKP-01854
    $0.00
    Out Of Stock
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  • New - H&K UMP/USC (.40 S&W/.45 ACP/9mm) Rear Sight - Incomplete - HKP-16372 HK UMP/USC (.40 S&W/.45 ACP/9mm) Rear Sight - Incomplete
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    HK UMP/USC (.40 S&W/.45 ACP/9mm) Rear Sight - Incomplete

    H&K Heckler & Koch

    $49.95
    H&K UMP/USC (.40 S&W/.45 ACP/9mm) Rear Sight - Incomplete
    HKP-16372
    $49.95
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    $49.95
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  • Out Of Stock
    New - MM HK UMP (9mm) Barrel - 16.5 Inch - HKP-02282

    HK UMP Barrel - 9mm - 16.5 Inch

    Michaels Machines

    $549.95
    MM HK UMP (9mm) Barrel - 16.5 Inch   Fluted just like the factory HK barrels with 16 flutes.
    HKP-02282
    $549.95
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  • Out Of Stock
    New - H&K 21E/23E (7.62x51/.308) & (5.56/.223) Carry Handle - HKP-00576

    HK21E, HK23E Carry Handle

    H&K Heckler & Koch

    $0.00
    HK 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
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  • New - PTR PDW (7.62x51/.308) 9 inch Barrel - HKP-02788 PTR PDW Barrel - 7.62 / .308 - 9" - SBR
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    PTR PDW Barrel - 7.62 / .308 - 9" - SBR

    PTR

    $189.99
    PTR 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
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    $189.99
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  • Out Of Stock
    New - HKP PTR-32 (7.62x39) Complete Bolt Group - PDW - HKP-17387 HK PTR-32 Bolt Group - Complete - PDW

    HK PTR-32 Bolt Group - Complete - PDW

    HKP HK Parts

    $379.95
    US 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
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  • New - H&K 53 (5.56/.223) Frangible Ammunition Adapter - 15x1 - HKP-16978 HK53 Frangible Ammunition Adapter - 15x1
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    HK53 Frangible Ammunition Adapter - 15x1

    H&K Heckler & Koch

    $149.95
    New 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
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    Qty in Cart: 0
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    $149.95
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  • New - RCM MP5K 40/10 Full Auto Bolt Carrier - HKP-01826 HK MP5K Bolt Carrier - Full Auto - .40 S&W / 10mm
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    HK MP5K Bolt Carrier - Full Auto - .40 S&W / 10mm

    RCM

    $157.95
    MP5K 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
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    Qty in Cart: 0
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    $157.95
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  • New - H&K MP5 .40 S&W Parts Kit - HKP-16719
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    HK MP5 Parts Kit - .40 S&W

    HKP HK Parts

    $2,959.95
    HK 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
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    $2,959.95
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  • New - H&K MP5-A2 .40 S&W German Parts Kit - HKP-00891
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    HK MP5 German Parts Kit - .40 S&W - A2 Stock

    HKP HK Parts

    $3,979.95
    HK 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
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    $3,979.95
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