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 HK21E/23E Inner & Outer Buffer Compression Springs - HKP-21856 HK21E, HK23E Compression Springs - Inner Buffer, Outer Buffer
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    HK21E, HK23E Compression Springs - Inner Buffer, Outer Buffer

    H&K Heckler & Koch

    $59.95
    H&K HK21E/23E Inner & Outer Buffer Compression Springs An unissued set of inner and outer buffer compression springs for your HK21E/23E buffer, sourced directly from HK Germany. Most HK21E/23E...
    HKP-21856
    $59.95
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  • New - H&K A3 Stock Release Lever Rebuild Kit - HKP-21851
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    HK A3 Buttstock Release Lever Rebuild Kit

    H&K Heckler & Koch

    $14.95
    H&K A3 Stock Release Lever Rebuild Kit This A3 collapsible stock rebuild kit is designed for the release lever on MP5, SP5, 93/53/33, and G3/91 collapsible stocks.  With A3 stocks becoming more...
    HKP-21851
    $14.95
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  • New - H&K HK21E/23E Rear Sight Base - HKP-21849 HK21E, HK23E Rear Sight Base
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    HK21E, HK23E Rear Sight Base

    H&K Heckler & Koch

    $89.95
    H&K HK21E/23E Rear Sight Base Factory German HK21E/23E rear sight base ready to weld on your build. The rear sight base serves as the mounting point for the rear sight, providing stability and proper...
    HKP-21849
    $89.95
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  • New - HKP P2000 MOD 1 Threaded Barrel Compensator - HKP-21797 HK P2000 MOD 1 Threaded Barrel Compensator
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    HK P2000 MOD 1 Threaded Barrel Compensator

    HKP HK Parts

    $179.95
    HK Parts MOD 1 Compensator for Threaded Barrel: P2000 The HK Parts MOD 1 compensator perfectly blends form and function, setting a new standard in muzzle control. Experience a significant reduction...
    HKP-21797
    $179.95
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  • Out Of Stock
    New - B&T APC9 Selector Position Lock Spring - HKP-21764 B&T APC9 Selector Position Lock Spring
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    B&T APC9 Selector Position Lock Spring

    B&T Brugger & Thomet

    $4.95
    B&T APC9 Selector Position Lock Spring Compatible With: APC Series Standard receiver Glock receiver
    HKP-21764
    $4.95
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    $4.95
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  • Out Of Stock
    New - B&T APC9 Pro Gun Mat - HKP-21748
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    B&T APC9 Pro Gun Mat

    B&T Brugger & Thomet

    $20.00
    B&T APC9 Pro Gun Mat  Specifications: 6mm thick 17x10.75
    HKP-21748
    $20.00
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  • New - H&K HK G3 Front Sight Ring - HKP-21641
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    HK G3 Front Sight Ring

    H&K Heckler & Koch

    $4.95
    H&K HK G3 Front Sight Ring Factory HK replacement front sight ring. Compatible With: HK G3
    HKP-21641
    $4.95
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  • On Sale
    New - H&K HK 940 .30-06 Rifle Barrel - HKP-21605 HK 940 Barrel - .30-06
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    HK 940 Barrel - .30-06

    H&K Heckler & Koch

    Now: $412.46
    Was: $948.95
    Heckler and Koch HK 940 .30-06 Rifle Barrel Genuine new HK 940 .30-06 barrel featuring date code and Ulm antler proof.  These barrels are unfired and fully nitrided for a lifetime of use. These...
    HKP-21605
    Now: $412.46
    Was: $948.95
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  • On Sale
    HK MP5K Parts Kit - .40 S&W - Pistol Build HK MP5K Parts Kit - .40 S&W - Pistol Build
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    HK MP5K Parts Kit - .40 S&W - Pistol Build

    Now: $1,646.96
    Was: $1,829.95
    HKP MP5K .40 S&W Pistol Build Kit MP5K .40 complete pistol build kit. Featuring the latest in highest quality components for an unparalleled build. Equipped with a 9/16x24 3-lug threaded barrel to...
    HKP-21534
    Now: $1,646.96
    Was: $1,829.95
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  • Out Of Stock
    New - H&K HK MR762 Factory Flash Hider - 15x1 RH - HKP-21481 HK MR762 Factory Flash Hider - 15x1 RH
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    HK MR762 Factory Flash Hider - 15x1 RH

    H&K Heckler & Koch

    $54.95
    H&K HK MR762 Factory Flash Hider - 15x1 RH Factory flash hider with 15x1 right-hand threads. Perfect for completing a build or replacing a worn or missing part. Compatible With: HK MR762<
    HKP-21481
    $54.95
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  • On Sale
    New - B&T HK G36/MP7 Picatinny Side Rail - HKP-21419 HK MP7, G36 Picatinny Side Rail
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    HK MP7, G36 Picatinny Side Rail

    B&T Brugger & Thomet

    Now: $52.16
    Was: $57.95
    B&T HK G36/MP7 Picatinny Side Rail Comes with all mounting hardware. Each rail is sold individually. Compatible With: HK G36 HK MP7
    HKP-21419
    Now: $52.16
    Was: $57.95
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  • On Sale
    New - H&K HK 416 14.5 Upper Receiver Assembly - OTB - Unfired - HKP-02095 HK416 Upper Receiver Assembly - 14.5" Barrel - OTB - Unfired
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    HK416 Upper Receiver Assembly - 14.5" Barrel - OTB - Unfired

    H&K Heckler & Koch

    Now: $9,999.95
    Was: $14,499.95
    Heckler and Koch Unfired "BF" Date Coded HK Factory German 416 14.5" Upper Kit No FFL is required. This upper assembly is only considered a part. This is a rare offering. All NFA rules apply - Check...
    HKP-02095
    Now: $9,999.95
    Was: $14,499.95
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