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 CC9 Trigger Complete - HKP-22126
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    HK CC9 Trigger Complete

    H&K Heckler & Koch

    $55.95
    H&K CC9 Trigger Complete Genuine H&K complete trigger assembly for the CC9 pistol. Compatible With: HK CC9  
    HKP-22126
    $55.95
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    $55.95
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  • New - H&K CC9 Ejector Roll Pin - HKP-22125
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    HK CC9 Ejector Roll Pin

    H&K Heckler & Koch

    $5.95
    H&K CC9 Ejector Roll Pin The ejector roll pin was made in Germany for the CC9 pistol, secures the ejector in place for proper ejection function. Compatible With: HK CC9  
    HKP-22125
    $5.95
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    $5.95
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  • New - H&K MG3 50 Round Assault Drum - HKP-22090 HK MG3 50 Round Assault Drum
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    HK MG3 50 Round Assault Drum

    H&K Heckler & Koch

    $27.95
    H&K MG3 50 Round Assault Drum H&K manufactured 50-round drum for the MG3. Unissued, but may have light marks or dust from long-term storage. Clips onto MG3 feed trays. With minor modifications, these can be run on HK21, HK21E, and HK51B setups...
    HKP-22090
    $27.95
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    $27.95
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  • New - HKP UMP Recoil Rod Spring - HKP-22089
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    HK UMP Recoil Rod Spring

    HKP HK Parts

    $9.95
    HKP UMP Recoil Rod Spring Upgrade or replace your UMP recoil system with this high-quality recoil rod spring from HK Parts. Whether you're maintaining a factory setup or enhancing a custom build, the HKP recoil rod spring is a perfect fit for UMP-style...
    HKP-22089
    $9.95
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    $9.95
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  • HK USP45T Stripped Slide HK USP45T Stripped Slide
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    HK USP45T Stripped Slide

    H&K Heckler & Koch

    $399.95
    H&K USP45T Stripped Slide Factory replacement slide for the HK USP45 Tactical. Compatible With: HK USP  
    HKP-22024
    $399.95
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    $399.95
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  • New - Nefarious Arms HK MR556/416 10.4" A5 Barrel - HKP-21873 HK416, MR556 Barrel - 5.56 - 10.4" - Threaded 1/2"x28 - A5 Profile
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    HK416, MR556 Barrel - 5.56 - 10.4" - Threaded 1/2"x28 - A5 Profile

    Nefarious Arms

    $594.95
    Nefarious Arms HK MR556416 10.4" A5 Barrel An expertly crafted 10.4" barrel designed for the HK MR556 and 416 platforms. Featuring the A5 profile, this barrel balances durability and weight, making it an excellent choice for both tactical and...
    HKP-21873
    $594.95
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    $594.95
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  • Out Of Stock
    New - B&T 52mm QD Skeleton Mount for Aimpoint ACRO - HKP-21860 Picatinny Optic Mount - 52mm - Skeleton - Aimpoint ACRO

    Picatinny Optic Mount - 52mm - Skeleton - Aimpoint ACRO

    B&T Brugger & Thomet

    $148.95
    B&T 52mm QD Skeleton Mount for Aimpoint ACRO The B&T QD Skeleton Mount for the Aimpoint ACRO offers a 52mm elevated profile for improved sight alignment. It is ideal for night vision setups that require clearance over forward-mounted IR devices...
    HKP-21860
    $148.95
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    $148.95
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  • On Sale
    New - HKP HK P30 Rail Mount Compensator for Threaded Barrel - HKP-21812 HK P30 Rail Mount Compensator, Threaded Barrel
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    HK P30 Rail Mount Compensator, Threaded Barrel

    HKP HK Parts

    Now: $149.95
    Was: $179.95
    HKP HK P30 Rail Mount Compensator for Threaded Barrel Upgrade your HK P30 with the HKP rail mount compensator.  Each comp balances form and function, featuring a design that flows with the P30 and a dramatic reduction in muzzle flip and recoil. HK...
    HKP-21812
    Now: $149.95
    Was: $179.95
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  • Out Of Stock
    New - Michaels Machines HK21E/PSG1/MSG90 Extractor - HKP-21632 HK21E, HK23E, PSG1, PTR Extractor

    HK21E, HK23E, PSG1, PTR Extractor

    Michaels Machines

    $275.95
    Michaels Machines HK21E, HK23E, PSG1, MSG90 Extractor Replacement extractor for HK21E, HK23E, PSG1, and MSG90 bolt heads. Extractors are a known wear item on these platforms and are no longer produced by HK. The Michaels Machines extractor is a precise,...
    HKP-21632
    $275.95
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  • New - HKP HK UMP 5 Prong Ported Flash Hider - 5/8x24 - HKP-21569 HK UMP 5 Prong Ported Flash Hider - 5/8x24
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    HK UMP 5 Prong Ported Flash Hider - 5/8x24

    HKP HK Parts

    $89.95
    HKP HK UMP 5 Prong Ported Flash Hider - 5/8x24 5-prong UMP ported flash hider designed for our new UMP 45 parts kit. Not only does it protect exposed threads, it also enhances the appearance of your firearm while delivering flash suppression. Compatible...
    HKP-21569
    $89.95
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    $89.95
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  • HK91, G3 Extractor - Used
HK91, G3 Extractor - Used
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    HK91, G3 Extractor - Used

    H&K Heckler & Koch

    $6.85
    HK German HK G3, HK, 91 & PTR 91 .308 Extractor - Used Surplus HK German extractor. Fits all models of HK G3 style firearms and CETME's. Compatible With: HKG3 HK91 PTR models Clones and other custom builds CETME & C308's
    HKP-21507
    $6.85
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    $6.85
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  • On Sale
    New - Magpul HK MP5K AR 9mm Navy Style Match Trigger Group - HKP-21378 HK MP5K Trigger Group - 9mm - Navy Style with AR Grip and Match Trigger
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    HK MP5K Trigger Group - 9mm - Navy Style with AR Grip and Match Trigger

    Magpul

    Now: $519.95
    Was: $649.95
    Magpul HK MP5K AR 9mm Navy Style Match Trigger Group Our improved HK-AR Navy ambidextrous lower housing is now paired with our match trigger pack and a Magpul MOE grip to make this complete MP5K-AR style match trigger group. This trigger group is a...
    HKP-21378-M
    Now: $519.95
    Was: $649.95
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    Now: $519.95
    Was: $649.95
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