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 - HKP HK UMP/USC (.40 S&W/.45 ACP/9mm) 4 Piece Picatinny Rail Set - HKP-17429 HK UMP, USC Picatinny Rail Set - 4 Piece

    HK UMP, USC Picatinny Rail Set - 4 Piece

    HKP HK Parts

    $149.95
    HK UMP, USC Rail Set Complete A complete set of rails for your HK UMP/USC featuring an extended top rail for mounting your optic of choice. The rails are scratch resistant, class 3 mil-spec hard...
    HKP-17429
    $149.95
    Qty in Cart: 0
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    $149.95
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  • New - H&K MP5, HK94 Recoil Spring - HKP-01652

    HK MP5, HK94 Recoil Spring

    H&K Heckler & Koch

    $12.95
    HK German MP5, HK94 Recoil Rod Assembly Spring Great replacement and spare recoil spring as this is a common repair and replacement item. Compatible With: HK MP5
    HKP-01652
    $12.95
    Qty in Cart: 0
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    $12.95
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  • On Sale
    New - HKP Glock 17 - +6 Round 9mm Magazine Extension Kit - HKP-18348-M Glock 17 - Magazine Extension Kit - 9mm - +6 Round

    Glock 17 - Magazine Extension Kit - 9mm - +6 Round

    HKP HK Parts

    Now: $12.91
    Was: $34.95
    HKP Glock 17 - +6 Round 9mm Magazine Extension Kit Designed to fit all of the Glock 17 models from Gen 1 through and up to the current Gen 5 models. Each unit is fully machined from a solid billet of...
    HKP-18348-M
    Now: $12.91
    Was: $34.95
    Qty in Cart: 0
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    Now: $12.91
    Was: $34.95
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  • New - Walther 30 Round HK 416 .22LR Magazine - Gray - HKP-01749 HK416 Magazine - .22LR - Gray

    HK416 Magazine - .22LR - Gray

    Walther

    $34.95
    HK, Umarex, Walther, HK416 .22LR Magazine - 30 Round Magazine   This is the factory OEM magazine for all of the models listed. Each magazine comes in charcoal gray color.
    HKP-01749
    $34.95
    Qty in Cart: 0
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    $34.95
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  • New - H&K HK MR556/416 Gas Block Roll Pin - HKP-02534

    HK416, MR556 Gas Block Roll Pin

    H&K Heckler & Koch

    $5.95
    Heckler and Koch Gas Block Pin for HK416 and MR556 This is the retaining pin for an HK416 gas block.
    HKP-02534
    $5.95
    Qty in Cart: 0
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  • Out Of Stock
    New - KCI 20 Round HK91/G3/PTR 7.62x51mm/308 Magazine - Black - HKP-19970 HK91, G3, PTR 20 Round Magazine

    HK91, G3, PTR 20 Round Magazine

    KCI

    $28.95
    HK 91, G3, PTR .308 20 Round All Steel Magazine - KCI Designed to fit your G3, HK91, & PTR style firearms chambered in .308 and 7.62x51. This standard capacity 20-round magazine provides reliable...
    HKP-19970
    $28.95
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    $28.95
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  • Out Of Stock
    New - H&K MP5 & MP5K 9mm Dual Magazine Clamp - HKP-00083 HK MP5, MP5K Dual Magazine Clamp - 9mm

    HK MP5, MP5K Dual Magazine Clamp - 9mm

    H&K Heckler & Koch

    $129.95
    HK German MP5, MP5K, SP5, SP5K 9mm Dual Magazine Clamp Genuine HK dual magazine clamp for twice the rounds exactly where you need them.  This is also a great way to swap between two different types...
    HKP-00083
    $129.95
    Qty in Cart: 0
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  • HK G3 Parts Kit - FMP HK G3 Parts Kit - FMP

    HK G3 Parts Kit - FMP

    FMP HK CONTRACT

    $159.95
    FMP - G3 Parts Kit - With Alloy Mag The G3 has been an iconic battle rifle utilized all over the world and revered as one of the best that H&K has offered. These kits are de-milled G3's that were...
    HKP-22531
    $159.95
    Qty in Cart: 0
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    $159.95
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  • New - Retractable Stock Buffer - MP5 A3 - USA - HKP-14012 HK MP5 A3 Telescopic Stock Buffer - USA

    HK MP5 A3 Telescopic Stock Buffer - USA

    $7.74
    MP5 A3 Retractable Stock "H" Buffer For All HK A3 Retractable Stocks The A3 stock buffer is a high-wear and replacement item that needs replacement when torn, cracked, brittle, discolored, and worn...
    HKP-14012
    $7.74
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    $7.74
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  • HK MP5, MP5K Dual Magazine Clamp - 9mm - HKP HK MP5, MP5K Dual Magazine Clamp - 9mm - HKP

    HK MP5, MP5K Dual Magazine Clamp - 9mm - HKP

    HKP HK Parts

    $49.95
    HKP MP5, MP5K, SP5, SP5K 9mm Dual Magazine Clamp HKP dual magazine clamp for twice the rounds exactly where you need them.  This is also a great way to swap between two different types of ammo, like...
    HKP-21667
    $49.95
    Qty in Cart: 0
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    $49.95
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  • Out Of Stock
    New - AC-Unity HK G3/HK91 Wide Handguard - HKP-21639 HK91, G3 Wide Handguard

    HK91, G3 Wide Handguard

    AC-Unity

    $74.95
    AC-Unity HK G3 Wide Handguard G3 length, black, wide handguard with bipod groove. Perfect fit for your HKG3, HK91, or PTR91 that takes standard G3 length handguards. Includes an inner heat shield...
    HKP-21639
    $74.95
    Qty in Cart: 0
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    $74.95
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  • New - HKP HK USP/USPC Laser - Red - HKP-16504 HK USP, USPC Laser - Red

    HK USP, USPC Laser - Red

    HKP HK Parts

    $29.95
    HKP HK USP/USPC Laser - Red Finally, a laser designed to fit the HK USP & USP Compact Family of firearms without a bulky and expensive adapter. This affordable offering is now available to all HK...
    HKP-16504
    $29.95
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    $29.95
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