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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  • Out Of Stock
    New - RCM HK G3/91 Threaded Barrel - 5/8x24 - CHF - HKP-21838 HK91, G3 Barrel - 7.62x51 - 17.7" - Threaded 5/8x24

    HK91, G3 Barrel - 7.62x51 - 17.7" - Threaded 5/8x24

    RCM

    $264.99
    RCM HK G3/91 Threaded Barrel - 5/8x24-CHE Machined by RCM from a Mil-Spec 41V50 Hammer Forged Blank. These blanks are considered to be one of the finest made. 1:10 twist, Nitride finish. Perfect for that HK build or to replace that shot out barrel. Each...
    HKP-21838
    $264.99
    Out Of Stock
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    $264.99
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  • New - HKP HK P30SK MOD 1 Compensator - Black - HKP-21798 HK P30SK Compensator - MOD 1
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    HK P30SK Compensator - MOD 1

    HKP HK Parts

    $179.95
    HK Parts MOD 1 Compensator: H&K P30SK The HK Parts MOD 1 compensator perfectly blends form and function, setting a new standard in muzzle control. Experience a significant reduction in muzzle flip and recoil, allowing you to get back on target faster...
    HKP-21798
    $179.95
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  • New - HKP HK G36 Picatinny Adapter - HKP-21665 HK G36 Picatinny Adapter
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    HK G36 Picatinny Adapter

    HKP HK Parts

    $129.95
    HKP HK G36 Picatinny Adapter Transform your G36 with our unbeatable rail stock adapter, engineered to seamlessly attach any 1913 Style Stock or brace. Our innovative design ensures the 1913 stocks & braces lock in securely, offering superior cheek...
    HKP-21665
    $129.95
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  • New - B&T 1/2x28 to Tri-lug Adapter for 9mm - HKP-21752 Tri-Lug Adapter - 1/2x28 RH to Tri-Lug - 9mm - B&T
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    Tri-Lug Adapter - 1/2x28 RH to Tri-Lug - 9mm - B&T

    B&T Brugger & Thomet

    $125.00
    B&T 1/2x28 to Tri-Lug Adapter for 9mm Convert any 1/2x28 RH 9mm threaded barrel to the HK spec. tri-lug with B&T's Swiss-made adapter adapter threaded 1/2x28. Compatible With the Following 9mm Firearms: HK MP5, MP5K, SP5, SP5K HK UMP...
    HKP-21752
    $125.00
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    $125.00
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  • New - B&T Official PVC Patch White - HKP-21735 B&T Official PVC Patch White
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    B&T Official PVC Patch White

    B&T Brugger & Thomet

    $5.00
    B&T Official PVC Patch White - 2.5"
    HKP-21735
    $5.00
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    $5.00
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  • Out Of Stock
    On Sale
    New - HKP HK 416 .22LR Dual Magazine Clamp - Black - BLEMISHED - HKP-21607-BL-B HK416 .22LR Dual Magazine Clamp - Black - BLEMISHED

    HK416 .22LR Dual Magazine Clamp - Black - BLEMISHED

    HKP HK Parts

    Now: $28.95
    Was: $49.95
    HKP HK416 .22LR Dual Magazine Clamp - Black - BLEMISHED MACHINE FLAWS COSMETICALLY BLEMISHED PARTS ARE FULLY FUNCTIONAL AND SOLD AS IS. THIS PART IS NOT ELIGIBLE FOR RETURN. ALL BLEMISHED PART SALES ARE FINAL. Securely hold two HK 416 .22LR magazines...
    HKP-21607-BL-B
    Now: $28.95
    Was: $49.95
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  • On Sale
    New - HKP Womens Short Sleeve Bundesadler Shirt - Black - HKP-21178-M HK Women's Shirt - Short Sleeve - Bundesadler
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    HK Women's Shirt - Short Sleeve - Bundesadler

    HKP HK Parts

    Now: $11.22
    Was: $19.95
    HKP Womens Short Sleeve Bundesadler Shirt - Black Get your hands on some of our premium new apparel! Featuring our sleek new logo printed over soft cotton, this shirt is certain to catch an eye at the range! Features: 100%...
    HKP-21178-M
    Now: $11.22
    Was: $19.95
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    Now: $11.22
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  • New - HK MP5K Buffer Replacement - HKP-21041 - Choate
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    HK MP5K, SP5K Buffer Replacement - Choate Stocks

    Choate

    $20.95
    HK MP5K & SP5K Buffer Replacement - Choate Stocks Choate factory replacement buffer kit for Choate MP5K and SP5K stocks only.
    HKP-21041
    $20.95
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    $20.95
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  • New - HKP Picatinny Rail Mount for Front Sight Tower - Red - HKP-20800 Picatinny Optic Mount, Front Sight Tower - Red
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    Picatinny Optic Mount, Front Sight Tower - Red

    $39.95
    HKP Picatinny Rail Mount for Front Sight Tower - Red HK Picatinny rail mount that replaces the forearm (small) push pin and mounts to the side of the front sight tower and allows you to add sling swivels, lasers, lights & accessories. This add on is...
    HKP-20800
    $39.95
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    $39.95
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  • New - SB Tactical HK91 SBA4 Pistol Stabilizing Brace & Adapter - HKP-19931 HK91 SBA4 Pistol Stabilizing Brace and Adapter
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    HK91 SBA4 Pistol Stabilizing Brace and Adapter

    SB Tactical

    $319.95
    SB Tactical HK91 SBA4 Pistol Stabilizing Brace & Adapter Includes: G3, HK91 backplate & recoil assembly AR, M4 stock adapter Complete buffer assembly Castle nut SB Tactical Brace Features: Made in the USA Designed after the SBM4 5-position...
    HKP-19931
    $319.95
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    $319.95
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  • New - RCM MP5 40, MP5 10mm Complete Bolt Group - HKP-19723 HK MP5 Bolt Group - Complete - .40 S&W, 10mm
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    HK MP5 Bolt Group - Complete - .40 S&W, 10mm

    HKP HK Parts

    $414.95
    RCM- MP5 40 & MP5 10mm - Bolt Group Complete Ideal to replace out of spec, worn, or broken bolt groups or for that custom build. Includes: RCM bolt head complete RCM locking piece RCM firing pin RCM firing pin spring RCM full auto bolt carrier...
    HKP-19723
    $414.95
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    $414.95
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  • New - H&K VP9/VP9SK & HK VP40 (9mm & .40 S&W) Complete Trigger Housing - HKP-16797
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    HK VP9, VP9SK, VP40 Trigger Housing - Complete - 9mm / .40 S&W

    H&K Heckler & Koch

    $89.95
    H&K VP9/VP9SK & HK VP40 (9mm & .40 S&W) Complete Trigger Housing Enhance the performance of your H&K VP9, VP9SK, or HK VP40 with this complete trigger housing. Designed for both 9mm and .40 S&W calibers, this high quality trigger...
    HKP-16797
    $89.95
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