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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    HK45C, USPC Firing Pin HK45C, USPC Firing Pin

    HK45C, USPC Firing Pin

    H&K Heckler & Koch

    $57.95
    H&K HK USPC/45C Firing Pin   A great spare part to have on hand for wear and breakage parts. A factory German HK OEM part. Compatible With: HK45 Compact HK45C Tactical HK USP Compact 45 HK USPC Tactical 45
    HKP-01288
    $57.95
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  • New - H&K HK MR556/416 Extractor - HKP-00036 HK416, MR556 Extractor
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    HK416, MR556 Extractor

    H&K Heckler & Koch

    $64.95
    HK 416 & MR556 Bolt Head Extractor New HK - German Compatible With: HK MR556 HK 416 CR556 HK M27  
    HKP-00036
    $64.95
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  • New - H&K HK MR556/416 Titanium Barrel Nut - HKP-17275 HK416, MR556 Barrel Nut - Titanium
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    HK416, MR556 Barrel Nut - Titanium

    HKP HK Parts

    $99.95
    Titanium HK MR556, HK 416 Barrel Nut Or Socket For Barrel A must have repair and replacement part for removal or when you have any work done to your barrel as the barrel nut may become damaged in the removal and installation processes. Made in the USA...
    HKP-17275
    $99.95
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    New - H&K UMP (.40 S&W/.45 ACP/9mm) Lower Backplate - HKP-16473 HK UMP Lower Backplate

    HK UMP Lower Backplate

    H&K Heckler & Koch

    $34.95
    HK Heckler and Koch .40 S&W, .45 ACP, 9mm Lower Backplate for HK UMP HK German Backplate for all UMP lowers. You will need to add your existing buffer or order one to make a complete buffer assembly.
    HKP-16473
    $34.95
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  • New - HDPS HK UMP/USC/G36/SL8 (.40 S&W/.45 ACP/9mm/5.56/.223) Trigger - HKP-02134 HK UMP, USC, G36, SL8 Trigger
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    HK UMP, USC, G36, SL8 Trigger

    HDPS

    $139.95
    HDPS US-Made Steel Trigger - USC & SL8 HDPS US-made triggers are ideal for meeting US 922r compliance as this counts as one of the needed parts when converting the HK USC to HK semi-auto UMP and the HK SL8 to semi-auto G36. Compatible...
    HKP-02134
    $139.95
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  • New - AIM HK 91/G3 (7.62x51/.308) Rifle Length Handguard - Keymod - HKP-18179 HK91, G3 Rifle Length Handguard - Keymod
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    HK91, G3 Rifle Length Handguard - Keymod

    AIM

    $89.95
    HK 91, G3, PTR RIFLE LENGTH HANDGUARD - KEY MOD This sleek streamlined design is an ultra low profile handguard with generous mounting space to accept all KeyMod accessories. Superior ergonomics and simple, drop-in installation makes this the best HK...
    HKP-18179
    $89.95
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  • Used - EBO HK G3 (7.62x51/.308) Parts Kit - Tungsten Filled Carrier - (Greek HK Contract) - HKP-17695 HK G3 Parts Kit  - Tungsten Filled Carrier - (Greek HK Contract)
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    HK G3 Parts Kit - Tungsten Filled Carrier - (Greek HK Contract)

    EBO

    $389.95
    HK Contract Greek EBO G3 .308/7.62 X 51mm Surplus Parts Kit Rare and HK Greek EBO Surplus G3 parts kits with the Tungsten filled bolt carriers. Each demilled parts kit comes with all parts from a functional HK G3 full auto rifle except the barrel and...
    HKP-17695
    $389.95
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  • HK MP5SD Apparel - Hats, Patches, and Shirts HK MP5SD Apparel - Hats, Patches, and Shirts
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    HK MP5SD Apparel - Hats, Patches, and Shirts

    HKP HK Parts

    $0.00
    HKP HK MP5SD Apparel and Patch Collection  Represent your platform with the HK Parts MP5SD Series apparel and accessories lineup. Built for enthusiasts who appreciate iconic firearms and clean, understated design, this collection delivers premium...
    HKP-22457-M
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    HK MP5, MP5K Optic Mount - 9mm - Raised - Picatinny HK MP5, MP5K Optic Mount - 9mm - Raised - Picatinny

    HK MP5, MP5K Optic Mount - 9mm - Raised - Picatinny

    MI Midwest Industries

    $119.95
    Midwest Industries HK MP5, MP5K Tall Optic Mount - 1913 Picatinny Rail Tall, clamp-on optic mount for HK MP5 and MP5K pattern firearms, giving a higher, more upright sightline while still allowing use of the factory diopter sights. Ideal for mounting...
    HKP-22397
    $119.95
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  • New - H&K/HKP Century AP51 Fixed Stock - Cerakoted - Enhanced Buffer - HKP-22183-M Century Arms AP51 Fixed Stock - Cerakoted - Enhanced Buffer
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    Century Arms AP51 Fixed Stock - Cerakoted - Enhanced Buffer

    HKP HK Parts / Heckler & Koch

    $199.95
    H&K/HKP Century AP51 Fixed Stock - Cerakoted - Enhanced Buffer Each stock starts life as an excellent condition surplus stock.  The stocks are then refinished and the recoil rod modified to work specifically with the AP51. Available...
    HKP-22183-M
    $199.95
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  • New - HKP HK 91/G3 Extractor - Enhanced Coated Polish - HKP-22182-M HK91, G3 Extractor - Enhanced Coated Polish
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    HK91, G3 Extractor - Enhanced Coated Polish

    HKP HK Parts

    $24.95
    HKP HK 91/G3 Extractor - Enhanced Coated Polish  Built for dependable performance, this polished and coated extractor delivers smooth cycling and consistent extraction. A great choice for both upgrades and routine replacements. Compatible With: HK...
    HKP-22182-M
    $24.95
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  • New - HKP 90 Series F1 Flat Trigger - Skeletonized - HKP-21580 HK MP5, G3, HK93 Flat Trigger - Skeletonized
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    HK MP5, G3, HK93 Flat Trigger - Skeletonized

    HKP HK Parts

    $68.95
    HKP 90 Series Flat Trigger - Skeletonized - USA The HK Parts skeletonized flat trigger for 90 series firearms offers improved control, reduced weight, and a modern look. Precision-machined from ordnance-grade billet steel with a QPQ nitride finish for...
    HKP-21580
    $68.95
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