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 - Magpul HK MP5 .22LR SL Hand Guard - Black - HKP-20480 HK MP5 Handguard - SL - .22LR
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    HK MP5 Handguard - SL - .22LR

    Magpul

    $99.95
    Magpul HK MP5 .22LR SL Handguard This forearm has been CNC machined to fit the HK MP5 .22 model specifically. The factory unit will not fit. HK parts took the time and made the modification possible using a CNC machine that was dedicated to removing...
    HKP-20480
    $99.95
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    $99.95
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  • New - RCM MP5K/SP89 9mm Full Auto Bolt Carrier - HKP-01190 HK MP5K, SP89 Bolt Carrier - Full Auto - 9mm - USA
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    HK MP5K, SP89 Bolt Carrier - Full Auto - 9mm - USA

    RCM

    $149.95
    MP5K Full Auto Bolt Carrier - US- Made - RCM This part is machined from billet ordnance steel. Our US-made MP5K carrier is made to the most updated and latest MP5K F specs. Tungsten filled, heat treated, and factory fresh production. Providing the finest...
    HKP-01190
    $149.95
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  • New - HKP MP5, HK94 & SP5K Rear Sight Drum & Base - HKP-17512 HK MP5, HK94, SP5K Rear Sight Drum and Base - US
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    HK MP5, HK94, SP5K Rear Sight Drum and Base - US

    HKP HK Parts

    $53.47
    HKP MP5, HK94 & SP5K Rear Sight Drum & Base Finally an affordable factory correct rear sight that does not break the bank or lead to settling for inferior 3rd world produced pot metal cast MP5 rear sights. We offer the only set that includes an...
    HKP-17512
    $53.47
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  • New - HKP HK Mark 23 Picatinny Rail Adapter - Gen 2 - HKP-01470 HK Mark 23 Picatinny Rail Adapter - Gen 2
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    HK Mark 23 Picatinny Rail Adapter - Gen 2

    HKP HK Parts

    $99.95
    HK Mark 23 Picatinny Rail Adapter (SOCOM) - Gen 2 The original Mark 23 rail adapter mount provides for a seamless attachment point of any tactical light, laser setup that attaches by way of a Picatinny rail. These units have been tested in the harshest...
    HKP-01470
    $99.95
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  • New - HKP HK UMP 45, SMG 45 Magazine Loader - HKP-19662 HK UMP 45, SMG 45 Magazine Loader
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    HK UMP 45, SMG 45 Magazine Loader

    HKP HK Parts

    $39.95
    HKP HK UMP 45, SMG 45 Magazine Loader The enhanced loader is the finest loader available for UMP 45 magazines. Speed up your load time and save your thumb in the process. Made in the USA. Compatible With: H&K UMP & USC 45 magazines LWRC SMG 45...
    HKP-19662
    $39.95
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  • New - HKP MP5 A3 Retractable Stock Buffer - HKP-18160
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    HK MP5 A3 Retractable Stock Buffer

    HKP HK Parts

    $6.74
    MP5 A3 Retractable Stock "H" Buffer For All HK A3 Retractable Stocks The A3 stock buffer is a high wear and common replacement items that does need to be replaced when they become torn, cracked, brittle, discolored & worn. These units are made from...
    HKP-18160
    $6.74
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  • New - HK Parts Range Bag - Large - HKP-20741 HKP Range Bag - Large
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    HKP Range Bag - Large

    HKP HK Parts

    $34.95
    HK Parts Range Bag - Large Get your hands on our new premium range bags. Main cover has loop fastener panel for hook and loop patches and name tape and a top hook and loop fastener loop for securing hearing protection for easy access when at the shooting...
    HKP-20741
    $34.95
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  • New - MP5 40/10 Extractor Spring - HKP-00409 HK MP5 Extractor Spring - .40 S&W / 10mm, .357 SIG
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    HK MP5 Extractor Spring - .40 S&W / 10mm, .357 SIG

    USA

    $9.95
    HK MP5 40/10 & .357 - Extractor Spring The extractor spring is the most common wear item on an MP5 and a must-have spare and replacement part. HK Germany no longer makes the MP5 40/10 extractor spring, and they are no longer available. Our offering...
    HKP-00409
    $9.95
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  • New - AC-Unity HK MP5 Fixed Stock - HKP-21640 HK MP5 Fixed Stock
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    HK MP5 Fixed Stock

    AC-Unity

    $69.95
    AC-Unity HK MP5 Fixed Buttstock - Gen 2 with Removable Butt Pads The AC-Unity HK MP5 fixed buttstock delivers superior performance and comfort. Featuring soft, shock-absorbing rubber recoil pads, it effectively replaces the outdated fixed but-pad,...
    HKP-21640
    $69.95
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  • New - HKP +4 HK 45C, USPC .45 ACP Magazine Extension - HKP-18654-M HKP +4 HK 45C, USPC .45 ACP Magazine Extension
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    HKP +4 HK 45C, USPC .45 ACP Magazine Extension

    HKP HK Parts

    $49.95 - $54.95
    HKP +4 HK 45C, USPC .45 ACP Magazine Extension HK Parts magazine extension +4 adds 4 additional rounds to the HK45C, 8 round magazine. Each unit can then be fully assembled into a 12 round HK45C magazine. Ideal for competitive shooters, concealed carry,...
    HKP-18654-M
    $49.95 - $54.95
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  • New - HKP HK MP5 .22LR Forearm - M-LOK - HKP-21260-M HKP HK MP5 .22LR Handguard - M-LOK
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    HKP HK MP5 .22LR Handguard - M-LOK

    HKP HK Parts

    $169.95
    HKP/H&K MP5 .22LR Forearm - M-LOK HK Parts brings you a long over due option for all the MP5 .22LR owners. Our new forearm takes the classic MP5 plastic forearm aesthetics from the MP5 .22LR and combine it with M-LOK compatible features for all sorts...
    HKP-21260-M
    $169.95
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  • HK MP5, SP5, MP5K, SP5K Magazine - 30 Round - 9mm - Bundesadler
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    HK MP5, SP5, MP5K, SP5K Magazine - 30 Round - 9mm - Bundesadler

    H&K Heckler & Koch

    $93.00
    Heckler and Koch 30 Round HK MP5 Bundesadler Magazine   The Bundesadler laser-etched into a factory German H&K magazine. Heckler and Koch German magazine 9mm 30 round curved all steel magazine. German HK MP5, MP5K mags are the finest HK...
    HKP-20914
    $93.00
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    $93.00
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