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 G36/SL8 (5.56/.223) Firing Pin Retaining Pin - HKP-02469 HK G36, SL8 Firing Pin Retaining Pin
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    HK G36, SL8 Firing Pin Retaining Pin

    H&K Heckler & Koch

    $10.95
    H&K G36/SL8 (5.56/.223) Firing Pin Retaining Pin Compatible With: HK G36 HK SL8
    HKP-02469
    $10.95
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    $10.95
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  • New - H&K G36/SL8 (5.56/.223) Bolt Catch Spring - HKP-01861
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    HK G36, SL8 Bolt Catch Spring

    H&K Heckler & Koch

    $9.95
    HK German G36 & SL8 Bolt Catch Spring  
    HKP-01861
    $9.95
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    $9.95
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  • HK UMP Paddle Magazine Release - Extended HK UMP Paddle Magazine Release - Extended
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    HK UMP Paddle Magazine Release - Extended

    HKP HK Parts

    $34.95
    HKP HK Parts Extended Paddle Magazine Release for HK UMP 9mm, .40 S&W, .45 ACP Billeted alloy UMP magazine release. This is a very common repair and replacement part as they are fairly easy to break on the UMP lower. With this new metal mag release...
    HKP-17919
    $34.95
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    $34.95
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  • New - HDPS HK UMP/USC Birdcage Flash Hider For Threaded Barrels - Threaded 16x1 LH - HKP-02579 HK UMP, USC Flash Hider  - Birdcage - Threaded 16x1 LH
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    HK UMP, USC Flash Hider - Birdcage - Threaded 16x1 LH

    HDPS

    $137.95
    HDPS HK UMP/USC Birdcage Flash Hider For Threaded Barrels - Threaded 16x1 LH Designed for threaded barrels with a 16x1 LH thread, this flash suppressor is modeled after the HK UMP flash suppressor for flanged barrels. It’s perfect for those who...
    HKP-02579
    $137.95
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    $137.95
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  • New - H&K UMP/USC (.40 S&W/.45 ACP/9mm) Slide For Lower - HKP-00268
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    HK UMP, USC Conversion Slide

    H&K Heckler & Koch

    $19.95
    HK USC & UMP Slide For Lower - German New HK German USC slide for conversion of UMP lower. 
    HKP-00268
    $19.95
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    $19.95
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  • Used - H&K 91/G3 A3 Retractable Stock - Used Good - HKP-18067 HK91, G3 A3 Retractable Buttstock - Used Good
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    HK91, G3 A3 Retractable Buttstock - Used Good

    H&K Heckler & Koch

    $799.95
    HK Heckler and Koch A3 Retractable Stock for HK G3 and HK91 in Excellent Condition Used HK German A3 retractable buttstocks pulled from German G3 rifles. All come in working order with various degrees of use but 100% operational. These range from Good to...
    HKP-18067
    $799.95
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    $799.95
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  • Out Of Stock
    New - H&K Central Buttstock Section - HK Green - HKP-16987 HK Factory Buttstock - Central Section - HK Green

    HK Factory Buttstock - Central Section - HK Green

    H&K Heckler & Koch

    $34.95
    H&K Central Buttstock Section - HK Green This stock section is no longer being manufactured as the G3 and HK91 are out of production.  PLEASE NOTE: These units have handling marks and the price has been set accordingly.
    HKP-16987
    $34.95
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  • New - PTR HK MP5K 9mm 2 Positions (S,F Pictogram) Grip Frame Housing - Clipped & Pinned - HKP-16443 HK MP5K Grip Frame Housing - 2 Positions S,F Pictogram - Clipped and Pinned - 9mm
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    HK MP5K Grip Frame Housing - 2 Positions S,F Pictogram - Clipped and Pinned - 9mm

    PTR

    $159.95
    PTR HK MP5K 9mm 2 Positions (S,F Pictogram) Grip Frame Housing - Clipped and Pinned This HK aftermarket trigger housing will accept all SEF style trigger packs. This is made by PTR 91 to exact HK specs. This housing comes clipped and ready for a...
    HKP-16443
    $159.95
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    $159.95
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  • HK USP, HK45 Compact Magazine, Complete - 18 Round HK USP, HK45 Compact Magazine, Complete - 18 Round
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    HK USP, HK45 Compact Magazine, Complete - 18 Round

    HKP HK Parts / Heckler & Koch

    $89.95
    Heckler and Koch, HKP 18 Round Magazine for HK45 Compact, HK USP45 Compact Complete 18-round magazine assembled using a factory Heckler and Koch magazine body combined with an HKP magazine extension. This configuration increases capacity while...
    HKP-22520
    $89.95
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    $89.95
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  • HK UMP Barrel Pin Screw HK UMP Barrel Pin Screw
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    HK UMP Barrel Pin Screw

    OMEGA

    $13.95
    Omega UMP Barrel Pin Screw Barrel pin Screw that replaces barrel pins on Omega Gideon Shadow Compatible With: HK UMP HK USC Omega GS
    HKP-22514
    $13.95
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    $13.95
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  • On Sale
    HK Trigger Pack Ejector Lever Axle - USED HK Trigger Pack Ejector Lever Axle - USED
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    HK Trigger Pack Ejector Lever Axle - USED

    H&K Heckler & Koch

    Now: $12.95
    Was: $19.95
    HK Trigger Pack Ejector Lever Axle - USED USED PARTS ARE SOLD AS IS. THIS PART IS NOT ELIGIBLE FOR RETURN. ALL BLEMISHED PART SALES ARE FINAL. HK German ejector lever axle pin for all HK trigger packs. This is the factory correct axle pin that holds the...
    HKP-01091-USED
    Now: $12.95
    Was: $19.95
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    Now: $12.95
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  • HK G36C Apparel - Hats, Patches, and Shirts HK G36C Apparel - Hats, Patches, and Shirts
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    HK G36C Apparel - Hats, Patches, and Shirts

    HKP HK Parts

    $0.00
    HKP HK G36C Apparel and Patch Collection  Represent your platform with the HK Parts G36C Series apparel and accessories lineup. Built for enthusiasts who appreciate iconic firearms and clean, understated design, this collection delivers premium...
    HKP-22456-M
    $0.00
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