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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  • Used - H&K 93/53/33 (5.56/.223) Surplus Fixed Stock - A2 - OD Green - HKP-18888 HK33, HK53, HK93 A2 Fixed Buttstock - Surplus - OD Green
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    HK33, HK53, HK93 A2 Fixed Buttstock - Surplus - OD Green

    H&K Heckler & Koch

    $139.95
    Surplus - Fixed Stock - OD Green - HK93,33,53 Hand-picked stocks in excellent condition. Comes with matching buttpad. Ready to install on your HK or clone rifle. German military surplus, but handpicked to give you the best of the offerings. Features: HK...
    HKP-18888
    $139.95
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    Qty in Cart: 0
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    $139.95
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  • New - H&K MR556 A4 11″ 5.56 M-LOK Upper Receiver Kit - HKP-21910 HK MR556 A4 Upper Receiver Kit - 11"-  M-LOK
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    HK MR556 A4 Upper Receiver Kit - 11"- M-LOK

    H&K Heckler & Koch

    $1,998.95
    H&K Heckler & Koch MR556 Upper Receiver Kit A4 -11″ - M-LOK  This kit includes a complete upper receiver/barrel assembly, allowing Mil-Spec 5.56mm AR-style rifles to be retrofitted to HK’s piston and pusher rod system. This...
    HKP-21910
    $1,998.95
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    Qty in Cart: 0
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    $1,998.95
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  • On Sale
    New - HKP HK MP5 9mm Receiver Flat - HKP-20921 HK MP5 Receiver Flat - 9mm
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    HK MP5 Receiver Flat - 9mm

    HKP HK Parts

    Now: $151.95
    Was: $189.95
    HKP HK MP5 9mm Receiver Flat New MP5 receiver flat made by the original German tool and die maker of the LSC receiver flat utilizing factory original German prints and specifications. The creator of our receiver flat has been regarded as the premier flat...
    HKP-20921
    Now: $151.95
    Was: $189.95
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    Now: $151.95
    Was: $189.95
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  • On Sale
    Used - USA HK G36 Top Rail Screw - HKP-20893 HK G36 Top Rail Screw
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    HK G36 Top Rail Screw

    USA

    Now: $2.95
    Was: $3.95
    USA HK G36 Top Rail Screw
    HKP-20893
    Now: $2.95
    Was: $3.95
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    Now: $2.95
    Was: $3.95
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  • On Sale
    New - RCM HK VP40 .40 S&W To .357 SIG Conversion Barrel - Non-Threaded - HKP-17373 HK VP40 Conversion Barrel - .40 S&W to .357 SIG - Non-Threaded
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    HK VP40 Conversion Barrel - .40 S&W to .357 SIG - Non-Threaded

    RCM

    Now: $212.95
    Was: $237.50
    RCM HK VP40 .40 S&W To .357 SIG Conversion Barrel - Non-Threaded   Each barrel is meticulously crafted from ordnance-grade steel, heat-treated, and finished with a durable nitride coating. This is the finest barrel for the HK VP40...
    HKP-17373
    Now: $212.95
    Was: $237.50
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    Qty in Cart: 0
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    Now: $212.95
    Was: $237.50
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  • Out Of Stock
    New - HK MP5, 94 UMP Style Folding Stock With HK Parts Brace/Stock Adapter - HKP-20215 HK MP5, HK94 Folding Stock With Adapter - UMP Style

    HK MP5, HK94 Folding Stock With Adapter - UMP Style

    USA

    $249.95
    HK MP5, HK94 Folding Stock With Adapter - UMP Style New US UMP style folding stock assembled with our own HK Parts stock adapter. Our HK Parts stock adapter was made from a solid billet of CNC machined aircraft grade aluminum with QD sling attachment...
    HKP-20215
    $249.95
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    $249.95
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  • HK G3, HK33, HK93 Bayonet with Scabbard - Surplus
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    HK G3, HK33, HK93 Bayonet with Scabbard - Surplus

    H&K Heckler & Koch

    $106.95
    HK Heckler and Koch Bayonet with Scabbard - Surplus for HK G3, HK33, HK93 Genuine German HK military surplus bayonet in used, good condition. These are the 12-groove version of the popular military bayonet.  Scabbard is included. Compatible...
    HKP-19691
    $106.95
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    Qty in Cart: 0
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    $106.95
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  • On Sale
    New - SilencerCo ASR .30 Cal AC233 Flash Hider - Threaded 15x1 - HKP-19507 ASR AC233 Flash Hider - .30 CAL - Threaded 15x1
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    ASR AC233 Flash Hider - .30 CAL - Threaded 15x1

    SilencerCo

    Now: $78.95
    Was: $92.95
    SilencerCo ASR .30 Cal AC233 Flash Hider - Threaded 15x1 The SilencerCo ASR .30 Cal AC233 Flash Hider is designed for use with ASR (Active Spring Retention) mounts, providing a quick attach/detach system compatible with nearly all SilencerCo suppressors...
    HKP-19507
    Now: $78.95
    Was: $92.95
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    Qty in Cart: 0
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    Now: $78.95
    Was: $92.95
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  • On Sale
    New - Bore Boss Pull-Through Bore Cleaner - .44/.45 - HKP-19401 Bore Boss Pull-Through Bore Cleaner - .44 / .45 ACP
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    Bore Boss Pull-Through Bore Cleaner - .44 / .45 ACP

    Real Avid

    Now: $10.95
    Was: $12.95
    Real Avid Bore Boss Pull-Through Bore Cleaner - .44/.45 From the barrel of innovation comes the ultra-compact Bore Boss, the first-ever self-storing, easy-feeding, clean-pulling, field-ready, hassle-free, pure-genius bore cleaner. The single-piece cable...
    HKP-19401
    Now: $10.95
    Was: $12.95
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    Qty in Cart: 0
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    Now: $10.95
    Was: $12.95
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  • On Sale
    New - Trijicon HK VP, P30, HK45C HD Night Sight Set - Yellow - HKP-14558
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    HK VP9, P30, HK45C HD Night Sight Set - Yellow

    Trijicon

    Now: $143.95
    Was: $169.95
    Trijicon HK VP, P30, HK45C HD Night Sight Set - Yellow The HD Night Sights were specifically created to address the needs of tactical shooters. The three-dot green tritium night sight set front sight features a taller blade and an aiming point ringed in...
    HKP-14558
    Now: $143.95
    Was: $169.95
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    Now: $143.95
    Was: $169.95
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  • New - H&K HK MR556/MR762/416 Extractor Spring Buffer - HKP-00051
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    HK416, MR556, MR762 Extractor Spring Buffer

    H&K Heckler & Koch

    $14.95
    H&K HK MR556/MR762/416 Extractor Spring Buffer This buffer fits inside the extractor spring in the extractor pocked of the bolt. This item is a high wear item and a spare would be highly advised. Compatible With: HK MR556 HK 416 HK MR762
    HKP-00051
    $14.95
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    Qty in Cart: 0
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    $14.95
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  • Out Of Stock
    New - H&K HK MR556/416 Commercial Factory E1 Rear Stock - Black - HKP-15426 HK416, MR556 E1 Buttstock - Factory - Commercial

    HK416, MR556 E1 Buttstock - Factory - Commercial

    H&K Heckler & Koch

    $199.95
    H&K HK MR556/416 Commercial Factory E1 Stock HK 416 factory German E1 Stock latest HK German stock for all HK 416/MR556 rifles. This HK 416 HKE1 Buttstock fits Commercial buffer tubes (receiver extensions) for M4/AR15 type weapons. NO LONGER OFFERED...
    HKP-15426
    $199.95
    Out Of Stock
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    $199.95
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