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
    HK MP5K, AP5-P End Cap - Incomplete - BLEMISHED HK MP5K, AP5-P End Cap - Incomplete - BLEMISHED
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    HK MP5K, AP5-P End Cap - Incomplete - BLEMISHED

    MKE

    Now: $19.95
    Was: $27.95
    MKE MP5K, AP5-P Incomplete End Cap - BLEMISHED COSMETICALLY BLEMISHED PARTS ARE FULLY FUNCTIONAL AND SOLD AS IS. THIS PART IS NOT ELIGIBLE FOR RETURN. ALL BLEMISHED PART SALES ARE FINAL. MKE manufactured end cap for AP5-P and HK MP5K pattern firearms...
    HKP-99397
    Now: $19.95
    Was: $27.95
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    Was: $27.95
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  • On Sale
    HK90 Series Cocking Tube End Cap - Aluminum - USED HK90 Series Cocking Tube End Cap - Aluminum - USED
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    HK90 Series Cocking Tube End Cap - Aluminum - USED

    HKP HK Parts

    Now: $7.95
    Was: $12.95
    HK Cocking Tube End Cap - Aluminum - USED USED PARTS ARE SOLD AS IS. THIS PART IS NOT ELIGIBLE FOR RETURN. ALL USED PART SALES ARE FINAL. Made from weight-saving aircraft-grade aluminum alloy. US-made. Compatible With: All 90 series HK firearms and...
    HKP-02806-USED
    Now: $7.95
    Was: $12.95
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    Now: $7.95
    Was: $12.95
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  • HK MP5KSD Barrel - 9mm - 4.89″- Threaded 18x1 HK MP5KSD Barrel - 9mm - 4.89″- Threaded 18x1
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    HK MP5KSD Barrel - 9mm - 4.89″- Threaded 18x1

    RCM

    $174.95
    HK MP5KSD Barrel - 9mm - 4.89″- Threaded 18x1 The RCM HK Style MP5 SD-K Barrel measures 4.890 inches in length and is constructed from 41v50 cold hammer-forged steel. It features a salt bath nitride finish throughout. This barrel is designed based...
    HKP-22493
    $174.95
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    $174.95
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  • HK MP5K, AP5-P Housing - Contoured - 0, 1 HK MP5K, AP5-P Housing - Contoured - 0, 1
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    HK MP5K, AP5-P Housing - Contoured - 0, 1

    MKE

    $169.95 - $179.95
    MKE Contoured 0, 1 Housing for HK MP5K and MKE AP5-P This contoured 0, 1 (safe/fire) trigger housing is for HK MP5K-pattern firearms and is manufactured in Turkey. Compatible With: MP5K MKE AP5-P, AP5-M In-spec clones and custom builds
    HKP-22468-M
    $169.95 - $179.95
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  • WOOX Edge Stock - Walnut - Picatinny Mount WOOX Edge Stock - Walnut - Picatinny Mount
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    WOOX Edge Stock - Walnut - Picatinny Mount

    WOOX

    $228.95 - $298.95
    WOOX Edge Stock - Walnut The WOOX Edge Stock is a premium upgrade for rifles and SMGs featuring a 3 Picatinny stock interface. It blends a precision-machined aluminum body with an American walnut cheek riser for a clean profile, solid lockup, and a...
    HKP-22460-M
    $228.95 - $298.95
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  • HK MR762 A4 Barrel - 16.5" - Proofed HK MR762 A4 Barrel - 16.5" - Proofed
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    HK MR762 A4 Barrel - 16.5" - Proofed

    H&K Heckler & Koch

    $459.95
    HK MR762 A4 Barrel - 16.5" - Proofed Factory proofed HK MR762 A4 16.5" barrel with standard 5/8x24 RH thread pitch. Compatible With: HK MR762 A4
    HKP-22453
    $459.95
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    $459.95
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  • On Sale
    HK G3 Standard Stock Buttpad - Green - Used - BLEMISHED H&K Heckler & Koch HKP-21865-ODG-B HK G3 Standard Stock Buttpad - Green - Used - BLEMISHED H&K Heckler & Koch HKP-21865-ODG-B
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    HK G3 ButtPlate with Catch Spring - Standard Stock - Green - Used - BLEMISHED

    H&K Heckler & Koch

    Now: $0.97
    Was: $2.95
    HK G3 Standard Stock Buttpad - Green - Used - BLEMISHED SOLD INDIVIDUALLY - CRACKED USED PARTS ARE SOLD AS IS. THIS PART IS NOT ELIGIBLE FOR RETURN. ALL BLEMISHED PART SALES ARE FINAL. This German-made buttpad is an excellent replacement for your...
    HKP-21865-ODG-B
    Now: $0.97
    Was: $2.95
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    Now: $0.97
    Was: $2.95
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  • Rail Panel Cover -  M-LOK - 6 Slot Rail Panel Cover -  M-LOK - 6 Slot
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    Rail Panel Cover - M-LOK - 6 Slot

    JMK

    $28.95
    JMK Rail Panel Cover - M-LOK - 6 Slot JMK M-LOK rail panels are compatible with platforms featuring 6 M-LOK slots. These modular panels are suited for numerous applications. Each panel is sold individually. M-LOK panels are CNC-machined from solid...
    HKP-22404-M
    $28.95
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    $28.95
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  • HK MP5K End Cap MKE HKP-22373 HK MP5K End Cap MKE HKP-22373
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    HK MP5K End Cap with Swivel Attachment

    MKE

    $69.95
    MKE End Cap with Swivel Attachment for HK MP5K  Durable factory-style end cap designed for MP5K platforms. Provides a secure sling mounting point for MP5K pistols. Compatible With: MP5K SP89 SP5K (may require some fitting, install lower pin...
    HKP-22373
    $69.95
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    $69.95
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  • HK P30 Rail, Plate - Replacement for MOD - Kit HKP HK Parts HKP-22370
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    HK P30 Compensator Replacement Rail Set - MOD 1

    HKP HK Parts

    $28.95
    HKP HK Parts HK P30 Rail and Plate Insert - Replacement MOD 1 Insert Kit  Replacement Picatinny rail and smooth plate inserts with hardware for the MOD 1 compensator.  Compatible With: HK P30 MOD 1 Compensator
    HKP-22370
    $28.95
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    $28.95
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  • Out Of Stock
    HK MP5 Safety Select Catch Lever Sleeve H&K Heckler & Koch HKP-22337 HK MP5 Safety Select Catch Lever Sleeve H&K Heckler & Koch HKP-22337

    HK MP5 Safety Select Catch Lever Sleeve - Ambi

    H&K Heckler & Koch

    $12.95
    HK MP5 Safety Select Catch Lever Sleeve - Ambidextrous Trigger Packs Factory replacement sleeve for the safety selector catch lever. Compatible With the Following Ambidextrous Trigger Packs: HK MP5/MP5K HK91/G3 HK93/53/33 HK23/21/11 ***Not compatible...
    HKP-22337
    $12.95
    Out Of Stock
    Qty in Cart: 0
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    $12.95
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  • HK416, MR556 Barrel Flute Cleaning Brush - 5.56 / .223 HK416, MR556 Barrel Flute Cleaning Brush - 5.56 / .223
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    HK416, MR556 Barrel Flute Cleaning Brush - 5.56 / .223

    HKP HK Parts

    $24.95
    HK MR556, HK416 Cleaning Brush - Barrel Flute - 5.56 / .223 This brush is a must-have for cleaning the chamber flutes on a MR556 or HK416 firearm. If the flutes become clogged or dirty, the firearm will cease to extract properly. An HK fluted barrel...
    HKP-22316
    $24.95
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    $24.95
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