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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  • Used - H&K A3 Retractable Stock Clamping Lever Spring - HKP-01089
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    HK A3 Buttstock Clamping Lever Spring - Retractable

    H&K Heckler & Koch

    $19.95
    HK German Retractable Stock Clamping Lever Spring For A3 Retractable Stocks This spring is the most common breakage/wear item in the internal workings of the A3 retractable stock.
    HKP-01089
    $19.95
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  • On Sale
    New - MFI Picatinny Rail Riser For Scope - HKP-00899 HK MP5 SP5K, SP89, G3, HK91, HK33, HK53, HK93 Rail Riser - Picatinny
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    HK MP5 SP5K, SP89, G3, HK91, HK33, HK53, HK93 Rail Riser - Picatinny

    MFI

    Now: $29.95
    Was: $44.95
    MFI Picatinny Rail Riser For Scope MFI Picatinny rail riser to elevate your optic by 18.8mm (.740"). This see-through riser allows a full view through the factory iron sights. This unit is similar to the A.R.M.S. #5 base scope mount and STANAG to...
    HKP-00899
    Now: $29.95
    Was: $44.95
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    Was: $44.95
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  • New - H&K MP5 9mm Cocking Tube - HKP-00093
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    HK MP5 Cocking Tube - 9mm

    H&K Heckler & Koch

    $109.95
    H&K MP5 9mm Cocking Tube New factory German HK uninstalled part directly from HK Germany. Rare and hard to find. Compatible With: MP5, 94, SP5 MP5 clones or other custom builds
    HKP-00093
    $109.95
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    $109.95
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  • Out Of Stock
    Used - H&K MP5, MP5K Case Deflector - HKP-00871 HK MP5, MP5K Case Deflector

    HK MP5, MP5K Case Deflector

    H&K Heckler & Koch

    $0.00
    HK German case deflector for receiver flat or receiver for all MP5, HK94, MP5K & SP89 builds. The case deflector is riveted or welded in place on the ejection port of the 9mm receiver/flat to aid in the extraction of the 9mm round. HK MP5, 94 HK...
    HKP-00871
    $0.00
    Out Of Stock
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    $0.00
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  • AR-15 ARC Fire - Forced Reset Trigger - Ambidextrous Levers AR-15 ARC Fire - Forced Reset Trigger - Ambidextrous Levers
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    AR-15 ARC Fire - Forced Reset Trigger - Ambidextrous Levers

    AS Designs

    $249.95
    ASD 3-Position ARC-Fire AR-15 Trigger with Ambidextrous Controls AS Designs' ARC-Fire (Active Reset Clutch) trigger is an innovative take on forced reset triggers.  The trigger is reset immediately after each shot, resulting in rapid follow-up shots...
    HKP-22501
    $249.95
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  • Out Of Stock
    New - RCM HK USP .40 to 9mm Conversion Barrel - Threaded - 1/2x28 - HKP-21787 HK USP Conversion Barrel - .40 S&W to 9mm - Threaded - 1/2x28

    HK USP Conversion Barrel - .40 S&W to 9mm - Threaded - 1/2x28

    RCM

    $214.95
    RCM HK USP .40 to 9mm Conversion Barrel - Threaded - 1/2x28 This 9mm conversion barrel is a drop-in replacement that allows your USP to shoot the popular 9mm cartridge. It has the standard 1/2x28 thread and comes with a thread protector. Each...
    HKP-21787
    $214.95
    Out Of Stock
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    $214.95
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  • On Sale
    New - SB Tactical HK MP5 SBA5 Pistol Stabilizing Brace - HKP-21672-M HK MP5 Pistol Stabilizing Brace - SBA5
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    HK MP5 Pistol Stabilizing Brace - SBA5

    SB Tactical

    Now: $214.95
    Was: $264.95
    SB Tactical HK MP5 SBA5 Pistol Stabilizing Brace SB Tactical brace married with our MP5 end cap creates a true drop-in brace.  With a 5-position adjustable length, this brace can be tailored to fit any body frame. Available exclusively here at HK...
    HKP-21672-M
    Now: $214.95
    Was: $264.95
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    Now: $214.95
    Was: $264.95
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  • New - B&T 30 Round Magazine Spring - 9mm - HKP-21758
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    MP9, TP9, APC9, GHM9, SPC9 Magazine Spring - 9mm - 30 Round

    B&T Brugger & Thomet

    $6.95
    B&T 30 Round 9mm Magazine Spring  Factory B&T replacement magazine spring for 30 round 9mm magazines. Compatible With: MP9/TP9 APC9 GHM9 SPC9
    HKP-21758
    $6.95
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    $6.95
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  • Out Of Stock
    New - Blitzkrieg PTR Spike Front Sight Gen 2 - Orange - HKP-21105 PTR Spike Front Sight Gen 2 - Orange

    PTR Spike Front Sight Gen 2 - Orange

    Blitzkrieg Components

    $84.95
    Blitzkrieg PTR Spike Front Sight Gen 2 - Orange The Blitzkrieg Gen 2 HK-style front sight introduces a modernized sighting system with enhanced precision and ease of use. Featuring a distinctive spike-tipped post and a bright Tritium dot with an orange...
    HKP-21105
    $84.95
    Out Of Stock
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    $84.95
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  • New - H&K 30 Round HK UMP .40 Magazine - LEO Marked - HKP-20664 HK UMP Magazine - .40 S&W - 30 Round - LEO Marked
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    HK UMP Magazine - .40 S&W - 30 Round - LEO Marked

    H&K Heckler & Koch

    $99.95
    30 Round Magazine - LEO Marked - New - UMP .40 S/W This magazine will fit all HK UMP .40 Caliber UMP's as well as the USC-UMP .40 caliber conversions. New factory fresh production HK magazine. The perfect option for those that like to collect LEO marked...
    HKP-20664
    $99.95
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    $99.95
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  • New - HKP 2 Point Leather Sling - Brown - HKP-20162 HKP 2 Point Leather Sling - Brown
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    HKP 2 Point Leather Sling - Brown

    HKP HK Parts

    $49.95
    2 Point Leather Sling - Brown These new HK Parts 2-point slings are based off of the original German HK design that are no longer offered. This is a 1st time offering, handcrafted by a German artisan. Made in the USA from quality leather and hardware for...
    HKP-20162
    $49.95
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    $49.95
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  • New - HKP Single Point Leather Sling - Black - HKP-20151 HK Single Point Leather Sling - Black
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    HK Single Point Leather Sling - Black

    HKP HK Parts

    $49.95
    Single Point Leather Sling - Black Our leather sling utilizes two HK style sling hooks to attach to a single mounting point. Designed to replicate the original, out of production, German HK offering. Each sling is handcrafted in the US by a German...
    HKP-20151
    $49.95
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    $49.95
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