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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  • On Sale
    New - H&K 30 Round HK MP5 9mm Magazine - TiN Coated - BLEMISHED - HKP-21643-B HK 30 Round HK MP5 9mm Magazine - TiN Coated - BLEMISHED
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    HK 30 Round HK MP5 9mm Magazine - TiN Coated - BLEMISHED

    H&K Heckler & Koch

    Now: $109.95
    Was: $149.95
    H&K 30 Round HK MP5 9mm Magazine - TiN Coated - BLEMISHED ONLY 1 UNIT AVAILABLE SCRATCHES ON MAGAZINE BODY. COSMETICALLY BLEMISHED PARTS ARE FULLY FUNCTIONAL AND SOLD AS IS. THIS PART IS NOT ELIGIBLE FOR RETURN. ALL BLEMISHED PART SALES ARE FINAL...
    HKP-21643-B
    Now: $109.95
    Was: $149.95
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    Now: $109.95
    Was: $149.95
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  • HK416, MR556 Barrel - 5.56 -  9" - Threaded 1/2"x28 - PDW - A1 and A3 HK416, MR556 Barrel - 5.56 -  9" - Threaded 1/2"x28 - PDW - A1 and A3
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    HK416, MR556 Barrel - 5.56 - 9" - Threaded 1/2"x28 - PDW - A1 and A3

    Nefarious Arms

    $594.95
    Nefarious Arms HK 416C 9" Barrel The Nefarious Arms HK416/MR556 Barrel is built for shooters who demand precision, durability, and consistent performance. Made in the USA from 4150 chromoly steel, cold-hammer-forged, and chrome-lined for enduring...
    HKP-21906
    $594.95
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    $594.95
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  • On Sale
    New - B&T APR338 Deployment Bag - HKP-21879 B&T APR338 Deployment Bag - With Sling
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    B&T APR338 Deployment Bag - With Sling

    B&T Brugger & Thomet

    Now: $189.95
    Was: $339.95
    B&T APR338 Lapua Magnum Deployment Bag Hidden for years in an unmarked crate, these genuine B&T contracted deployment cases are perfect for keeping your valuable B&T APR rifle, or any other rifle, safe and secure.  The cases were crafted...
    HKP-21879
    Now: $189.95
    Was: $339.95
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    Now: $189.95
    Was: $339.95
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  • On Sale
    New - H&K HK P7M13 Magazine Follower - Black - BLEMISHED - HKP-02364-B
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    HK P7M13 Magazine Follower - Black - BLEMISHED

    H&K Heckler & Koch

    Now: $22.95
    Was: $49.95
    H&K HK P7M13 Magazine Follower - Black - BLEMISHED ONLY 2 UNITS AVAILABLE COSMETICALLY BLEMISHED PARTS ARE FULLY FUNCTIONAL AND SOLD AS IS. THIS PART IS NOT ELIGIBLE FOR RETURN. ALL BLEMISHED PART SALES ARE FINAL. All steel construction, brand new...
    HKP-02364-B
    Now: $22.95
    Was: $49.95
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    Qty in Cart: 0
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    Now: $22.95
    Was: $49.95
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  • New - H&K A3 Stock Release Lever Rebuild Kit - HKP-21851
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    HK A3 Stock 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 expensive it's a great idea to keep this kit on...
    HKP-21851
    $14.95
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    Qty in Cart: 0
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    $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 alignment for accuracy on your HK21E or HK23E. As...
    HKP-21849
    $89.95
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    Qty in Cart: 0
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    $89.95
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  • On Sale
    Used - HK 93/53/33 Unfinished Polymer Trigger Piece - USED - HKP-99050 HK33, HK53, HK93 Unfinished Polymer Trigger Piece - USED
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    HK33, HK53, HK93 Unfinished Polymer Trigger Piece - USED

    USA

    Now: $14.95
    Was: $79.95
    HK 93/53/33 Unfinished Polymer Trigger Piece - USED This unfinished trigger piece is compatible with HK 90 series firearms. Ideal for those looking to complete or customize their build. Compatible With: HK 93/53/33 THIS CLOSEOUT PART IS NOT ELIGIBLE...
    HKP-99050
    Now: $14.95
    Was: $79.95
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    Now: $14.95
    Was: $79.95
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  • New - HKP HK MP5K .40/10 Picatinny Rail Brace/Stock Adapter - HKP-21833 HK MP5K Stock or Brace Adapter - 10mm / .40 S&W - Picatinny Rail
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    HK MP5K Stock or Brace Adapter - 10mm / .40 S&W - Picatinny Rail

    HKP HK Parts

    $129.95
    HKP HK MP5K .40/10 Picatinny Rail Brace/Stock Adapter Open your MP5K up to a vast range of brace and stock options with our Picatinny rail stock adapter.  Designed specifically for the MP5K 40 cal and 10mm platforms.  Available exclusively at...
    HKP-21833
    $129.95
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    Qty in Cart: 0
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    $129.95
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  • On Sale
    HK MP5F Bolt Group - Complete - BLEMISHED New - H&K MP5 F Bolt Group Complete - BLEMISHED - HKP-00953-B
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    HK MP5F Bolt Group - Complete - BLEMISHED

    H&K Heckler & Koch

    Now: $1,895.95
    Was: $4,399.95
    H&K MP5 F Bolt Group Complete - BLEMISHED   COSMETICALLY BLEMISHED PARTS ARE FULLY FUNCTIONAL AND SOLD AS IS. THIS PART IS NOT ELIGIBLE FOR RETURN. ALL BLEMISHED PART SALES ARE FINAL.   The bolt head, bolt carrier, and all F/A-related parts...
    HKP-00953-B
    Now: $1,895.95
    Was: $4,399.95
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    Qty in Cart: 0
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    Now: $1,895.95
    Was: $4,399.95
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  • New - RCM HK P30 .40 to 9mm Conversion Barrel - Threaded - 13.5x1 - HKP-21786 HK P30 Conversion Barrel - .40 S&W to 9mm - Threaded 13.5x1
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    HK P30 Conversion Barrel - .40 S&W to 9mm - Threaded 13.5x1

    RCM

    $214.95
    RCM HK P30 .40 to 9mm Conversion Barrel - Threaded - 13.5x1 This 9mm conversion barrel is a drop-in replacement that allows your P30 to shoot the popular 9mm cartridge. Comes with a thread protector. Each barrel is made from ordnance-grade steel,...
    HKP-21786
    $214.95
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    Qty in Cart: 0
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    $214.95
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  • New - B&T HK G36 Helmet Stock - HKP-21692 HK G36 Helmet Stock
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    HK G36 Helmet Stock

    B&T Brugger & Thomet

    $280.00
    B&T HK G36 Helmet Stock The B&T G36 helmet stock was designed to clearance the operator's helmet when viewing the target through the rifle's sights.  This military derived design is precision made in Switzerland. Compatible With: HK G36
    HKP-21692
    $280.00
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    Qty in Cart: 0
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    $280.00
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  • 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

    $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 accept a wide variety of muzzle devices and...
    HKP-21534
    $1,829.95
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    Qty in Cart: 0
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    $1,829.95
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