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 - Bore Boss Pull-Through Bore Cleaner - .357/9mm/.38 - HKP-19400 Bore Boss Pull-Through Bore Cleaner - 9mm / .357 / .38
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    Bore Boss Pull-Through Bore Cleaner - 9mm / .357 / .38

    Real Avid

    $12.95
    Real Avid Bore Boss Pull-Through Bore Cleaner - .357/9mm/.38 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...
    HKP-19400
    $12.95
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    $12.95
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  • New - H&K HK USP Recoil Rod Secondary Buffer Spring - HKP-02470 HK USP Buffer Spring
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    HK USP Buffer Spring

    H&K Heckler & Koch

    $9.95
    HK USP Recoil Rod Secondary Buffer Spring This is the spring found under the larger primary recoil spring on the recoil assembly Compatible With: HK USP 45 HK USP 40 HK USP 9mm All HK USP Tactical models HK Elite, Expert
    HKP-02470
    $9.95
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    $9.95
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  • New - H&K HK MR556/416 Battle Grip Storage Cap Pin - HKP-16861 HK416, MR556 Storage Cap Pin for Pistol Grips
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    HK416, MR556 Storage Cap Pin for Pistol Grips

    H&K Heckler & Koch

    $4.95
    H&K HK MR556/416 Battle Grip Storage Cap Pin  
    HKP-16861
    $4.95
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    $4.95
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  • New - H&K 21E/23E/11E/13E Hammer Spring - HKP-15453
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    HK21E, HK23E, HK11E, HK13E Hammer Spring

    H&K Heckler & Koch

    $19.95
    HK German HK21E, 23E, 11E & 13E Hammer Spring - German This is the heaviest HK hammer spring available for the roller lock family of firearms. The factory correct hammer spring for the beltfed series of firearms. Made in Germany and production has...
    HKP-15453
    $19.95
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  • New - RCM HK 51 (7.62x51/.308) Barrel - Threaded 15x1 RH - HKP-02391 HK51 Barrel - 7.62 / .308 - 8.375" - Threaded 15x1 RH
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    HK51 Barrel - 7.62 / .308 - 8.375" - Threaded 15x1 RH

    RCM

    $164.95
    RCM HK 51 (7.62x51/.308) Barrel - Threaded 15x1 RH Crafted to precise HK51 specifications, this barrel utilizes HK's renowned cold hammer forged (CHF) process. Features include a knurled sight ring, splined design for secure flash hider attachment, and a...
    HKP-02391
    $164.95
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    $164.95
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  • Used - H&K 91/G3 (7.62x51/.308) Fixed Stock - Alpine Green - Surplus - HKP-17112 HK91, G3 Fixed Stock - Alpine Green - Surplus
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    HK91, G3 Fixed Stock - Alpine Green - Surplus

    H&K Heckler & Koch

    $29.95
    HK German Surplus G3, 91, PTR Stock Complete - Alpine Green The Alpine green stock was the last version that the German military produced and is the darkest green version available. All stocks are 90's production, date coded and made by HK for the...
    HKP-17112
    $29.95
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  • New - HKP MP5K/SP89/SP5K 9mm End Cap - HK Style - HKP-16135 HK MP5K, SP89, SP5K End Cap with Sling Swivel - 9mm - HKP
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    HK MP5K, SP89, SP5K End Cap with Sling Swivel - 9mm - HKP

    HKP HK Parts

    $49.95
    HKP MP5K/SP89/SP5K 9mm End Cap - HK Style This end cap is an identical reproduction of the factory end cap and features the original HK style buffer. Compatible With: MP5K SP5K SP89 In spec. clones and custom builds
    HKP-16135
    $49.95
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    $49.95
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  • New - H&K MP5F & MP5 40,10 Recoil Rod Assembly - HKP-00133 HK MP5 Recoil Rod Assembly - Complete
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    HK MP5 Recoil Rod Assembly - Complete

    H&K Heckler & Koch

    $79.95
    German HK MP5F Recoil Assembly This is the factory-correct MP5F or MP5 40/10 Recoil Rod assembly. Most commonly used for MP5's that are using +P or +P+ ammunition or any high impulse 9mm. Or for all MP5 40 or 10-mm bolt groups. A great upgrade to have...
    HKP-00133
    $79.95
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    $79.95
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  • New - HKP MP5, MP5K Rear Sight Base - Billeted - HKP-18087
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    HK MP5, MP5K Rear Sight Base - Billeted

    HKP HK Parts

    $17.95
    Billeted MP5, MP5K Rear Sight Base - Weldment All steel HK MP5, MP5K billeted rear sight base. The most correct MP5, MP5K rear sight base available. The only billeted factory correct sight base with the factory HK German side axis grooves. If you want...
    HKP-18087
    $17.95
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    $17.95
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  • Out Of Stock
    New - Trijicon 90 Series Front & Rear Night Sight Set - HKP-00373 HK90 Series Night Sight Set - Front and Rear

    HK90 Series Night Sight Set - Front and Rear

    Trijicon

    $124.95
    Trijicon 90 Series Front & Rear Night Sight Set Trijicon produces the brightest night sights available for Heckler & Koch sub guns and rifles. These tritium night sight inserts are a no-brainer for quicker, more accurate point-and-shoot...
    HKP-00373
    $124.95
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  • New - HKP MP5 AR Brace/Stock Adapter - HKP-17118 HK MP5 Stock or Brace Adapter - AR
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    HK MP5 Stock or Brace Adapter - AR

    HKP HK Parts

    $114.95
    HKP MP5 AR Brace/Stock Adapter   Each AR stock, brace adapter is made from a solid billet of CNC machined aircraft grade aluminum. Properly buffered with factory correct H buffers to protect your expensive firearm. This is the finest AR stock...
    HKP-17118
    $114.95
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  • Out Of Stock
    New - H&K Navy Extended Selector Lever - 3 Position - HKP-00125 H&K Navy Extended Selector Lever - 3 Position H&K Heckler & Koch HKP-00125

    HK Navy Extended Selector Lever - 3 Position

    H&K Heckler & Koch

    $199.95
    HK Ambidextrous Left Side EXTENDED (ESSL) 3 Position Navy Selector Lever  New German HK Extended lever for all 3 position navy ambidextrous trigger packs or trigger groups. It will not fit SEF-style trigger packs.   
    HKP-00125
    $199.95
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    $199.95
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