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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  • On Sale
    New - HKP 1st Gen Roller Retainer Plate To Spring Upgrade - HKP-02119
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    HK Gen 1 Spring Upgrade - Roller Retainer Plate

    HKP HK Parts

    Now: $7.96
    Was: $9.95
    HKP 1st Gen Roller Retainer Plate To Spring Upgrade This action 3 roller retainer spring for all 1st Generation bolt heads replaces the oval-shaped roller retainer plate. HK made a wire spring as an upgrade for later production bolt heads to improve the...
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    Was: $9.95
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    New - SB Tactical MP5 & SP5 Folding Brace - HKP-18017 HK MP5 Folding Brace
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    HK MP5 Folding Brace

    SB Tactical

    Now: $89.95
    Was: $119.95
    SB Tactical Side Folding Brace for the HK MP5 and SP5 model SBT5A Features: Each brace comes assembled ready to install no assembly required Made in the USA B&T inspired design & styling The finest folding pistol brace option for your HK MP5...
    Now: $89.95
    Was: $119.95
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    New - MI HK MP5/K, SP5/K Scope Mount Picatinny Rail - HKP-19368 HK MP5, MP5K Optic Mount - Picatinny
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    HK MP5, MP5K Optic Mount - Picatinny

    MI Midwest Industries

    Now: $72.86
    Was: $80.95
    MI Midwest Industries HK MP5, MP5K Mount - Scope - 9mm - Picatinny Rail Specifications: Easy no gunsmith install, all tools included Allows the user to mount an optic and a light or laser while retaining the factory handguard Patent-pending rock-solid...
    Now: $72.86
    Was: $80.95
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    New - BDM 50 Round HK MP5 .22LR Magazine Drum - Translucent - HKP-16235 HK MP5 .22LR Drum Magazine - 50 Round - Translucent
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    HK MP5 .22LR Drum Magazine - 50 Round - Translucent

    BDM Black Dog Machine

    Now: $89.95
    Was: $99.95
    HK MP5 .22 50 Round Drum Magazine For The MP5-A5 & MP5-SD .22 Rifle Made in the USA by BDM exclusively for HK Parts. Using an existing drum model that is tried and true. Compatible With: HK, Walther, Umarex MP5 & MP5SD .22 rifles. MP5...
    Now: $89.95
    Was: $99.95
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    New - H&K MP5, MP5K & SP5K 9mm Extractor - HKP-00057 HK MP5, MP5K Extractor - 9mm
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    HK MP5, MP5K Extractor - 9mm

    H&K Heckler & Koch

    Now: $59.36
    Was: $65.95
    New HK German HK 9mm Extractor - Latest Generation This is the latest and greatest HK MP5 (newest F style version) German extractor. Each unit works with all HK MP5, HK94, HK MP5K, HK SP89, HK SP5K, or other 9mm clones. A great part to have as a spare or...
    Now: $59.36
    Was: $65.95
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    New - HKP HK MP5 RMR / Holosun Optic Mount - HKP-20731-M HK MP5 Optic Mount - Holosun, RMR
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    HK MP5 Optic Mount - Holosun, RMR

    HKP HK Parts

    Now: $78.36
    Was: $97.95
    HKP HK Parts HK MP5 Mount - Optic - Holosun, RMR The finest mounting solution to properly mount your RDS on your MP5 or any other receiver that utilizes the same style mounting system. With our 3 piece optic mount, it makes installation a breeze. No...
    Now: $78.36
    Was: $97.95
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  • On Sale
    New - MKE HK MP5/K 9mm Ejector Lever - HKP-21920 HK MP5, MP5K Ejector Lever - 9mm
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    HK MP5, MP5K Ejector Lever - 9mm

    MKE

    Now: $17.95
    Was: $19.95
    MKE HK MP5/K 9mm Ejector Lever Upgrade or replace your worn ejector lever with this quality part, made for HK MP5 and MP5K 9mm models. Whether you're finishing a build or refreshing your setup, this piece helps keep your firearm running. Compatible...
    Now: $17.95
    Was: $19.95
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    New - FMP Rifle Extractor Spring For All HK's - HK Contract FMP - HKP-16248 HK Rifle Extractor Spring - FMP
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    HK Rifle Extractor Spring - FMP

    H&K Heckler & Koch

    Now: $3.14
    Was: $3.49
    HK Parts contracted with FMP to bring you this Rifle Extractor Spring Features: New FMP contract The extractor spring is the number one replaced item on HK firearms. Many HK gunsmiths recommend upgrading HK94, HK MP5 series HK's with a longer stronger...
    Now: $3.14
    Was: $3.49
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  • Used - H&K 91/G3 (7.62x51/.308) Ejector Lever - Used - HKP-01738
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    HK91, G3 Ejector Lever - Used

    H&K Heckler & Koch

    $3.95
    .308 Ejector Lever - Used   In perfect working order, pulled from surplus HK German G3's.   Compatible With: HK G3 HK 91 PTR-91 HK 51
    $3.95
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    New - H&K HK USP/P/45 Enhanced Match Flat Sear Spring - HKP-01811 HK45, USP Spring - Flat Sear - Match - Enhanced
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    HK45, USP Spring - Flat Sear - Match - Enhanced

    H&K Heckler & Koch

    Now: $8.96
    Was: $9.95
    Enhanced Match Flat Sear Spring The nickel-plated sear spring is also regarded as a "match" flat spring as it will improve the feel and "smoothness" when pulling the trigger as it takes up some of the gritty feel. It is a must-have upgraded part to...
    Now: $8.96
    Was: $9.95
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    New - Maglula MP5/SP5 Magazine Loader/Unloader - HKP-14546 Maglula MP5/SP5 Magazine Loader/Unloader
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    Maglula MP5/SP5 Magazine Loader/Unloader

    Maglula

    Now: $26.95
    Was: $29.95
    Maglula Mag Loader/Unloader When using this part, the magazines can be loaded in 1/3 (60% less) of the time than loading by hand; this equates to more time shooting and less time loading. Features: Easy to use (step-by-step instructions included) Loads...
    Now: $26.95
    Was: $29.95
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  • On Sale
    New - H&K 20 Round HK VP9, HK P30 9mm Complete Magazine - Black - HKP-18917 HK VP9, HK P30 Magazine - 20 Round - 9mm
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    HK VP9, HK P30 Magazine - 20 Round - 9mm

    H&K Heckler & Koch

    Now: $53.10
    Was: $59.00
    HK VP9 &P30, P30L, P30S - 9mm - 20 Round Complete Magazine  New HK German Manufactured & Factory Fresh Production. Each factory HK magazine holds 20 rounds for use in all VP9, P30, P30L, P30S 9mm Models. Each magazine is marked with the...
    Now: $53.10
    Was: $59.00
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