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 - TPM Glock 9mm +3 Magazine Extension - HKP-21136-M Glock 9mm +3 Magazine Extension
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    Glock 9mm +3 Magazine Extension

    Tactical Precision MFG

    Now: $16.46
    Was: $39.95
    TPM Glock 9mm +3 Magazine Extension This extension is made from machined 6061 aluminum. This magazine extension will increase the capacity, reload speed, mag drops, and overall functionality of your pistol. Available in various colors to customize to...
    HKP-21136-M
    Now: $16.46
    Was: $39.95
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    Now: $16.46
    Was: $39.95
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  • New - HKP HK MP5, SP5 20 Round Magazine Spring - HKP-20687 HK MP5, HK94, SP5 Magazine Spring - 20 Round
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    HK MP5, HK94, SP5 Magazine Spring - 20 Round

    HKP HK Parts

    $6.95
    20 Round Magazine Spring - HK MP5, 94, SP5 Fits all factory spec steel 20 round MP5, 94 style curved magazines. A must-have repair and replacement part great for spares.
    HKP-20687
    $6.95
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  • New - B&T TP9 Top Cover w/ Side Mounting Rail - HKP-17293
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    B&T TP9 Top Cover, Side Optic Mount - Complete

    B&T Brugger & Thomet

    $159.95
    B&T TP9 Top Cover Complete with Side Mounting Rail B&T factory top cover.  Polymer construction. Compatible With: B&T TP9
    HKP-17293
    $159.95
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    $159.95
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  • New - RCM HK P30 .40 S&W Tactical Barrel - Threaded 9/16x24 RH - HKP-16714 HK P30 Tactical Barrel - .40 S&W - 4.45" - Threaded 9/16x24 RH
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    HK P30 Tactical Barrel - .40 S&W - 4.45" - Threaded 9/16x24 RH

    RCM

    $225.00
    RCM HK P30 .40 S&W Tactical Barrel - Threaded 9/16x24 RH Each barrel is meticulously crafted from ordnance-grade steel, heat-treated, and finished with a durable nitride coating. This is the finest threaded replacement barrel for the HK P30 .40...
    HKP-16714
    $225.00
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    $225.00
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  • New - H&K HK VP9/VP9SK, VP40 Sear Release Catch - Black - HKP-16798
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    HK VP9, VP9SK, VP40 Sear Release Catch

    H&K Heckler & Koch

    $7.95
    Sear Release Catch HK VP9, VP40 Compatible With: HK VP9 HK VP9A1 F HK VP9A1 K HK VP9SK HK VP40
    HKP-16798
    $7.95
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  • Out Of Stock
    New - RCM HK USP .40 S&W To .357 SIG Conversion Barrel - Non-Threaded - HKP-17746 HK USP Conversion Barrel - .40 S&W to .357 SIG - Non-Threaded

    HK USP Conversion Barrel - .40 S&W to .357 SIG - Non-Threaded

    RCM

    $237.50
    RCM HK USP .40 S&W To .357 SIG Conversion Barrel - Non-Threaded Each barrel is finely and painstakingly made from ordnance grade steel, heat treated, with a nitrided finish inside and out. This is the finest replacement barrel available for the HK...
    HKP-17746
    $237.50
    Out Of Stock
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    $237.50
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  • New - H&K HK USPC V1/5/9 Control Lever - HKP-01412 HK USP Compact V1, V5, V9 Control Lever
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    HK USP Compact V1, V5, V9 Control Lever

    H&K Heckler & Koch

    $43.95
    H&K HK USPC V1/5/9 Control Lever This is the lever for the de-cock and safety functions for right-hand shooters (left side of frame). This lever will provide the safety and decock function if you have a Var 1,2 detent installed. This is the most...
    HKP-01412
    $43.95
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    $43.95
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  • New - H&K HK 416/MR556 Commercial Factory German E2 Rear Stock - Black - HKP-18360 HK416, MR556 E2 Buttstock - Commercial, Factory German
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    HK416, MR556 E2 Buttstock - Commercial, Factory German

    H&K Heckler & Koch

    $249.95
    HK416, MR556 Factory German E2 Stock - Commercial HK German Stock For All HK 416, MR556 Rifles The HKE2 Buttstock fits Commercial buffer tubes (receiver extensions) for M4/AR15 type weapons and has the concave style removable buttpad installed...
    HKP-18360
    $249.95
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  • New - HDPS HK SL8 Conversion Stock Block - HKP-00807 HK SL8 to G36 Stock Block - Conversion - Pull Pin
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    HK SL8 to G36 Stock Block - Conversion - Pull Pin

    HDPS

    $389.95
    HDPS SL8 To G36 Stock Block This is the latest generation of a stock block with the pull pin, NOT the older style with the sling eyelets. The HDPS SL8 to G36 conversion stock block comes complete and includes a built-in buffer recoil rod, housing, steel...
    HKP-00807
    $389.95
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    $389.95
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  • Out Of Stock
    New - USA HK UMP/USC .45 Semi Auto Bolt Carrier - Complete - HKP-18588 HK UMP, USC Bolt Carrier - Semi Auto - .45 ACP - Complete

    HK UMP, USC Bolt Carrier - Semi Auto - .45 ACP - Complete

    USA

    $399.95
    USA HK UMP/USC .45 Semi Auto Bolt Carrier - Complete Replacement part for USC to UMP conversions. Marked .45 semi auto just like the OEM carrier. Includes: Extractor Firing Pin Firing Pin Spring Firing Pin Retaining Pin Compatible With: HK UMP ...
    HKP-18588
    $399.95
    Out Of Stock
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    $399.95
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  • New - HKP HK 93/53/33 (5.56/.223) Firing Pin - Titanium - HKP-17769
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    HK33, HK53, HK93 Firing Pin - Titanium

    HKP HK Parts

    $49.95
    HK93, 33, 53 Firing Pin - Titanium A must have upgrade to have on hand as the firing pin is one of the most abused components in the HK 93, HK33 & HK53 weapon system. Get the lightest, strongest firing pin available for your HK firearm. Ideal for...
    HKP-17769
    $49.95
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    $49.95
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  • Used - HKP MP5 9mm SEF Style 0,1 Trigger Pack - Safe, Semi Only - HKP-00152 HK MP5 Trigger Pack - 9mm - SEF Style 0,1 - Safe, Semi
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    HK MP5 Trigger Pack - 9mm - SEF Style 0,1 - Safe, Semi

    HKP HK Parts

    $359.95
    HKP/H&K MP5/K 9mm SEF Semi-Auto Complete Trigger Pack We have one of the best HK gunsmiths in the country that can take hand-picked German HK F/A trigger packs and modify them to semi-auto. This is done with the best and most precise machinery and...
    HKP-00152
    $359.95
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    $359.95
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