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 - B&T MP5, MP5K Low Mount For T1/H1 & T2 Aimpoint - HKP-16862 HK MP5, MP5K Optic Mount - Low Profile - Aimpoint T1, H1, T2
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    HK MP5, MP5K Optic Mount - Low Profile - Aimpoint T1, H1, T2

    B&T Brugger & Thomet

    $100.00
    B&T MP5, MP5K Low Mount For T1/H1 & T2 Aimpoint Ideal for use with the Aimpoint line of T-1/T2 & H-1/H2 type of optics. This mount is the lowest low profile mount available for use with the T1/T2 style of mounting system. This same mounting...
    $100.00
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    $100.00
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  • New - Magpul HK MP5K, HK SP5K, HK SP89 SL Hand Guard - Black - HKP-19310 HK MP5K, SP5K, SP89 Handguard - SL
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    HK MP5K, SP5K, SP89 Handguard - SL

    Magpul

    $47.45
    Magpul HK MP5K, HK SP5K, HK SP89 SL Handguard The Magpul SL Handguard for the SP89/MP5K/SP5K is a high-strength, injection-molded polymer handguard solution that provides the user with improved ergonomics, anti-slip texturing,...
    $47.45
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    $47.45
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  • Out Of Stock
    New - H&K UMP/USC (.40 S&W/.45 ACP/9mm) Barrel Roll Pin - HKP-00603

    HK UMP, USC Barrel Roll Pin

    H&K Heckler & Koch

    $11.94
    Heckler and Koch German made USC and UMP Universal Barrel Roll Pin HK recommends replacing the barrel pin when the barrel is removed with a new barrel pin. This is a great spare part to have on hand. The factory-correct barrel pin for all HK UMP and USC...
    $11.94
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  • New - RCM MP5K/SP89 9mm Full Auto Bolt Carrier - HKP-01190 HK MP5K, SP89 Bolt Carrier - Full Auto - 9mm
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    HK MP5K, SP89 Bolt Carrier - Full Auto - 9mm

    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...
    $149.95
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  • Used - HK MP5, HK SP5 Rear Sight Sets Complete - HKP-19365
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    HK MP5, HK SP5 Rear Sight Sets Complete

    H&K Heckler & Koch

    $79.95
    MP5, HK94 & SP5K Rear Sight Set Complete - US/German Each rear sight set includes the entire rear sight assembly & all the mounting hardware for the complete MP5 rear sight assembly. All parts are German HK manufacture with the exception of the...
    $79.95
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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,...
    $49.95 - $54.95
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  • New - HKP Roller +9 - New - 8.09mm - HKP-19438 HK Roller +9 - New - 8.09mm
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    HK Roller +9 - New - 8.09mm

    HKP HK Parts

    $8.99
    Roller +9 - New - 8.09mm HK Parts Standard (8.09 mm) locking roller, The proper roller size is essential for proper bolt gap. US Manufacture. Please Note: The price listed is per roller. Order 2 (pair) for a complete set for the bolt head. An easy way to...
    $8.99
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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...
    $53.47
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  • New - MP5 40/10 Extractor Spring - HKP-00409 HK MP5 Extractor Spring - 9mm / .40 S&W
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    HK MP5 Extractor Spring - 9mm / .40 S&W

    $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...
    $9.95
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  • New - H&K UMP (.45 ACP) 25 Round Magazine Spring - HKP-01548
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    HK UMP Magazine Spring - .45 ACP - 25 Round

    H&K Heckler & Koch

    $9.95
    H&K UMP (.45 ACP) 25-Round Magazine Spring Perfect for spares and to have on hand as these are a consumable item that needs to be replaced from time to time. A must-have item if you own a USC/UMP conversion or UMP.
    $9.95
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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...
    $99.95
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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...
    $6.74
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