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 - H&K HK G36K Slimline Handguard - Black - HKP-18483 HK G36K Handguard - Slimline Style
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    HK G36K Handguard - Slimline Style

    H&K Heckler & Koch

    $0.00
    G36K Slim line handguard with Hkey mounting slots HK German G36K forearm with HKey mounting slots. Made in Germany.
    HKP-18483
    $0.00
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    New - H&K G36K Factory (5.56/.223) 4 Prong Flash Hider - Threaded 15x1 RH - HKP-00282 HK G36K, SL8 Flash Hider - 4 Prong - Threaded 15x1 RH
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    HK G36K, SL8 Flash Hider - 4 Prong - Threaded 15x1 RH

    H&K Heckler & Koch

    $0.00
    HK Heckler and Koch's Factory 4 Prong Flash Hider - 15x1 RH   HK flash hider will fit any HK 5.56/.223 rifle barrel threaded 15x1 RH.  
    HKP-00282
    $0.00
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    New - H&K HK G36 Complete Bolt Group - Black - HKP-00635 HK G36 Bolt Group - Complete
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    HK G36 Bolt Group - Complete

    H&K Heckler & Koch

    $0.00
    HK G36 Bolt Group New Factory German HK. HK G36 HK G36K HK G36CThis will not work with a HK SL8.
    HKP-00635
    $0.00
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  • New - H&K HK 45 Recoil Spring Guide Rod - Black - HKP-18592
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    HK45 Recoil Spring Guide Rod

    H&K Heckler & Koch

    $59.95
    H&K HK 45 Recoil Spring Guide Rod - Black Compatible With: HK 45 HK 45 Tactical
    HKP-18592
    $59.95
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    New - RCM HK VP40 to .357 Sig Conversion 1/2x28 Barrel - Black - HKP-17372 HK VP40 to .357 Sig Conversion 1/2x28 Barrel - Black
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    HK VP40 to .357 Sig Conversion 1/2x28 Barrel - Black

    RCM

    $250.00
      HK VP40 to .357 SIG Conversion Barrel Threaded 1/2x28- RCMEach barrel is finely & painstakingly made from ordnance grade steel, heat treated & finished inside & out in the ultra- desirable...
    HKP-17372
    $250.00
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    New - H&K MP5/SP5, 93/33, G3/91 (9mm, 5.56/.223, 7.62/.308) Unmarked Ambidextrous Housing - Universal - HKP-19854 HK MP5, SP5, HK33, HK93, HK91, G3 Housing - Ambi - Unmarked - 9mm, 5.56 / .223, 7.62 / .308
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    HK MP5, SP5, HK33, HK93, HK91, G3 Housing - Ambi - Unmarked - 9mm, 5.56 / .223, 7.62 / .308

    H&K Heckler & Koch

    $0.00
    H&K MP5/SP5, 93/33, G3/91 (9mm, 5.56/.223, 7.62/.308) Unmarked Ambidextrous Housing - Universal This unmarked universal ambidextrous lower housing is designed for use with ambidextrous trigger packs,...
    HKP-19854
    $0.00
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  • On Sale
    New - Franklin Armory BFSIII AK-C1 Standard Caliber - HKP-19833 AK Binary Trigger - Curved - BFSIII
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    AK Binary Trigger - Curved - BFSIII

    FA Franklin Armory

    Now: $364.49
    Was: $534.95
    Franklin Armory BFSIII AK-C1 Standard Caliber - 7.62x39 The Binary Firing System GEN 3 (BFSIII) is a 3-position trigger. In position 3 it fires one round on pull and one round on release, making...
    HKP-19833
    Now: $364.49
    Was: $534.95
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    Used - H&K HK G36 Magazine Catch Release Lever - HKP-19771 HK G36, SL8 Bolt Locking Lever - Complete - USED
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    HK G36, SL8 Bolt Locking Lever - Complete - USED

    H&K Heckler & Koch

    $9.95
    H&K HK G36, SL8 Complete Locking Lever: USED   The locking lever is installed within the trigger housing, ensuring reliable and secure bolt lockup. Used in good condition. 
    HKP-19771
    $9.95
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    Used - H&K HK G3, 91 F/A Complete Bolt Group - HKP-19671 HK91. G3 F/A Complete Bolt Group
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    HK91. G3 F/A Complete Bolt Group

    H&K Heckler & Koch

    $0.00
    German  G3, 91 F/A Bolt Group CompleteEach Bolt group includes the following factory HK parts: Complete Bolt Head Assembled (extractor, extractor spring, roller retainer plate and rollers) >Firing...
    HKP-19671
    $0.00
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    New - HK German Carry Handle - HK91, G3, HK93, & HK33 - New Old Stock - HKP-19551 HK91, G3, HK33, HK93 Carry Handle - New Old Stock
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    HK91, G3, HK33, HK93 Carry Handle - New Old Stock

    H&K Heckler & Koch

    $0.00
    HK German Carry Handle for HK91, G3, HK93, & HK33 Weapon Systems - New Old Stock HK German new old stock condition. The carry handle installs by sliding the carry handle over the cocking tube to make...
    HKP-19551
    $0.00
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    New - HK UMP Paddle Mag Release Complete Assembly - HKP-19499 HK UMP Paddle Magazine Release Assembly, Complete
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    HK UMP Paddle Magazine Release Assembly, Complete

    USA

    $19.95
    UMP Paddle Magazine Release - US Made - Assembly Complete New UMP Mag release. This is a very common repair and replacement part as they are fairly easy to break on the UMP lower. Simple and easy to...
    HKP-19499
    $19.95
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    Used - H&K HK 416 Collapsible Stock Mil Spec - RAL 7008 - HKP-19503 HK416 E1 Collapsible Buttstock - Mil Spec - RAL7008
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    HK416 E1 Collapsible Buttstock - Mil Spec - RAL7008

    H&K Heckler & Koch

    $0.00
    Collapsible HK 416 E1 Style Mil Spec - HK 416 RAL 7008 - Dark Earth Color Genuine Heckler & Koch HK416 surplus buttstocks in the RAL 7008 color scheme. HK-USA nows offers these surplus E1 Mil-Spec...
    HKP-19503
    $0.00
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