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 MP5 & MP5K 9mm Magazine Floor Plate - HKP-17507 HK MP5, HK94, SP5K Magazine Floorplate - 9mm - US
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    HK MP5, HK94, SP5K Magazine Floorplate - 9mm - US

    HKP HK Parts

    $9.95
    HK MP5 & MP5K 9mm Magazine Floor Plate - US New US manufactured MP5, MP5K 9mm magazine floor plate. Made in the USA, fully heat treated and built to factory specification. A great replacement for 922r compliance as it counts as 1 US made compliant...
    $9.95
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    $9.95
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  • On Sale
    New - HKP HK USP Pistol Light, Laser Adapter - HKP-00960 HK USP Pistol Light, Laser Adapter - Mount
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    HK USP Pistol Light, Laser Adapter - Mount

    HKP HK Parts

    Now: $14.95
    Was: $28.95
    HKP HK USP Pistol Light, Laser Adapter This is the flashlight adapter needed for all HK USP Full Size Pistols to attach an aftermarket light or laser to the bottom rail of the firearm since HK USP's use a proprietary rail system. Made from hard coat...
    Now: $14.95
    Was: $28.95
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  • Out Of Stock
    New - RCM HK MP5/SP5 #27/90 Degree Locking Piece - HKP-21334 HK MP5, SP5 Locking Piece #27 - 90 degree

    HK MP5, SP5 Locking Piece #27 - 90 degree

    RCM

    $34.95
    HK MP5, SP5 Locking Piece #27 - 90 degree Machined and properly heat treated from ordnance grade steel.  A must have component for users running a suppressed set up or cycling a variety of ammunition. This will assist with fine-tuning pistol...
    $34.95
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  • New - KES HK MP5K Buttstock - HKP-21087 HK MP5K Stock - KES
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    HK MP5K Stock - KES

    Safety Harbor Firearms

    $279.99
    KES HK MP5K Stock The all-new KES for the MP5k is designed to fit HK clones with two pins affixing the rear receiver cap. Specifications: Guide rods slide into the existing slots present on the receiver Rods machined to go underneath the reinforcing...
    $279.99
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  • New - HKP HK VP9/VP9L Optics Plate #8 - Holosun 407K/507K Optic Mount - HKP-20016 HK VP9 Optic Plate #8 - Holosun 407K, 507K - Red Dot Pistol Mount
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    HK VP9 Optic Plate #8 - Holosun 407K, 507K - Red Dot Pistol Mount

    HKP HK Parts

    $49.95
    HK VP9 Series Optics Plate #8 - Holosun 407K/507K Optic Mount - Steel The finest all steel mounting solution for your HK VP9 Series Optic Ready model. New solid billet machined steel optics plate. Each plate is CNC machined from a solid billet of...
    $49.95
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  • New - PTR HK 91/G3 (7.62x51/.308) Receiver Flat - HKP-02320 HK91, G3 Receiver Flat - US Made
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    HK91, G3 Receiver Flat - US Made

    PTR

    $99.95
    HK G3, 91, PTR & CETME Flat - PTR Made by PTR with original HK tooling using factory specifications and a properly stamped receiver. No FFL is required as this is an unfolded flat that ships directly to the customer. This US made receiver flat...
    $99.95
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  • On Sale
    Used - HK 91/G3 (7.62x51/.308) Rubberized Mag Pouch - Surplus - HKP-16321 HK91, G3 Rubberized Mag Pouch - Surplus
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    HK91, G3 Rubberized Mag Pouch - Surplus

    Now: $3.71
    Was: $9.95
    German Surplus Green Rubberized Mag Pouch Used Compatible With: HK G3, 91, PTR & CETME Custom HK builds & HK Clones Please note: These range in shades of green color from OD green to Jungle green. If you have a preference please make a note...
    Now: $3.71
    Was: $9.95
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  • New - RCM Rollers, + & - Sizes - HKP-22094-M RCM Rollers, + & - Sizes
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    RCM Rollers, + & - Sizes

    RCM

    $8.95
    RCM Rollers, + & - Sizes RCM US-made locking rollers are available in both plus and minus sizes, making them the ideal choice for adjusting bolt gaps. These rollers are the top-tier locking rollers on the market, delivering unbeatable performance and...
    $8.95
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  • New - MKE HK MP5/MP5K Replacement Parts Kit - HKP-21896
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    HK MP5, MP5K Replacement Parts Kit

    MKE

    $24.95
    MKE Replacement Parts Kit for your HK MP5 and HK MP5K Firearm Keep your MP5 or MP5K in peak condition with this comprehensive MKE HK MP5/MP5K replacement parts kit. Manufactured to exacting standards by MKE, this kit includes high-quality replacement...
    $24.95
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  • New - PTR Semi Auto Spacer With Elbow Spring - Match Grade - HKP-00838 HK Semi Auto Spacer with Elbow Spring - Match Grade
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    HK Semi Auto Spacer with Elbow Spring - Match Grade

    PTR

    $11.95
    PTR Semi Auto Spacer With Elbow Spring - Match Grade   For use on all HK semi-auto trigger packs. It's a must-have for those converting a full auto trigger pack to semi-auto. This unit provides a "match" grade feel to your trigger pull. 
    $11.95
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  • New - Grayguns HK P30/P30L/P30SK Straight Trigger - HKP-19748 HK P30, P30L, P30SK Straight Trigger
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    HK P30, P30L, P30SK Straight Trigger

    Grayguns

    $95.00
    Grayguns HK P30/P30L/P30SK Straight Trigger Designed by Keith Hosey, Grayguns' director of gunsmithing, the HK P30 Straight Trigger is a first-of-its-kind in the market. Fits all P30 variants. Reduces over-travel while featuring a 90-degree optimal...
    $95.00
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  • New - H&K MP5 & MP5K Railed Scope Mount - MLI - HKP-17629 HK MP5, SP5K Optic Mount - 5 - 5/8" - MLI - Picatinny Rail
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    HK MP5, SP5K Optic Mount - 5 - 5/8" - MLI - Picatinny Rail

    H&K Heckler & Koch

    $359.99
    HK German Low Profile Mount for HK MP5, SP5 & MP5K, SP5K - MLI HK German manufactured HK MP5, MP5K low profile Picatinny scope mount. Manufactured at HK in Germany as part of the "Mid-Life Improvement" upgrade for the HK MP5 family of firearms. The...
    $359.99
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