All Parts

All 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 - HKP HK 416, Colt M4 .22 Match Trigger Upgrade Spring Kit - HKP-17340
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    HK416, Colt M4 Spring Kit - .22LR - Match Trigger Upgrade

    HKP HK Parts

    $17.49
    HK 416 .22 & Colt M4 .22 Match Trigger Spring Kit - Set of 3 Enhanced Springs: The HKP match trigger spring kit delivers a lighter, smoother, and crisper trigger pull translating to on-target accuracy.  Lower your pull weight by ~ 3lbs courtesy...
    $17.49
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  • 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

    $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...
    $9.95
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    $9.95
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  • On Sale
    New - SB Tactical MP5 & SP5 Folding Brace - HKP-18017 HK MP5 Folding Brace
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    HK MP5 Folding Brace

    SB Tactical

    Now: $99.95
    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: $99.95
    Was: $119.95
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    Now: $99.95
    Was: $119.95
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  • New - MI HK MP5/K, SP5/K Scope Mount Picatinny Rail - HKP-19368 HK MP5, MP5K Mount - Scope - 9mm - Picatinny Rail
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    HK MP5, MP5K Mount - Scope - 9mm - Picatinny Rail

    MI Midwest Industries

    $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...
    $80.95
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  • New - BDM 50 Round HK MP5 .22LR Magazine Drum - Translucent - HKP-16235 BDM 50 Round HK MP5 .22LR Magazine Drum - Translucent
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    BDM 50 Round HK MP5 .22LR Magazine Drum - Translucent

    BDM Black Dog Machine

    $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...
    $99.95
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  • New - HKP HK MP5 RMR / Holosun Optic Mount - HKP-20731-M HK MP5 Mount - Optic - Holosun, RMR
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    HK MP5 Mount - Optic - Holosun, RMR

    HKP HK Parts

    $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...
    $97.95
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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

    $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...
    $65.95
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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 - 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

    $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...
    $3.49
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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

    $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...
    $9.95
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  • New - H&K 20 Round HK VP9, HK P30 9mm Complete Magazine - Black - HKP-18917 HK 20 Round HK VP9, HK P30 9mm Complete Magazine
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    HK 20 Round HK VP9, HK P30 9mm Complete Magazine

    H&K Heckler & Koch

    $59.00
    HK VP9 &P30, P30L, P30S - 9mm - 20 Round Magazine Complete 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 factory 20...
    $59.00
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  • New - MFI HK MP5/G3/93 Micro Low Mount - HKP-17962 MFI HK MP5/G3/93 Micro Low Mount
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    MFI HK MP5/G3/93 Micro Low Mount

    MFI

    $110.95
    HKPARTS 2025 MFI Micro 1913 Picatinny Rail Scope Mount for HK MP5/94/G3/91/93 This mount allows for installation without completely removing the screws from the mounting claws. The claws can remain attached to the bolt or screw, allowing the entire...
    $110.95
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