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 - HKP MP5 9mm Barrel Extension - HKP-18000
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    HK MP5 Barrel Extension - 9mm

    HKP HK Parts

    $49.95
    HKP MP5 9mm Barrel Extension The MP5 3-lug barrel extension functions as a fake suppressor to give the standard 8.85" barrel an overall length of 16" for rifle builds.  The extension slips over the tri-lug adapter and is pinned into place by a...
    HKP-18000
    $49.95
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  • Used - H&K MP5/SP5 Rear Sight Sets Complete All 7 Pieces - HKP-02531
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    HK MP5/SP5 Rear Sight Sets Complete All 7 Pieces

    H&K Heckler & Koch

    $129.95
    MP5, SP5, MP5K, & SP5K Rear Sight Set Complete - German HK Each rear sight set includes the entire rear sight assembly & all the mounting hardware for the complete MP5 rear sight assembly.  Each Set Includes The Following German HK...
    HKP-02531
    $129.95
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    $129.95
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  • HK416/MR556 Adaptive Battle Grip with Storage - Black H&K Heckler & Koch HKP-22298 HK416/MR556 Adaptive Battle Grip with Storage - Black H&K Heckler & Koch HKP-22298
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    HK416, MR556, HK417, MR762 Pistol Grip

    H&K Heckler & Koch

    $78.95
    HK Heckler and Koch's Pistol Grip with Storage - Black HK German factory pistol grip with a storage compartment in the bottom. It has a superior fit and feel to any other grip on the market. This is a great upgrade for any AR, M16 platform. Compatible...
    HKP-22298
    $78.95
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    $78.95
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  • New - SB Tactical - HK MP5 Brace with HKP Adapter - Skeletonized - HKP-21055 HK MP5 Brace and HKP Adapter - Skeletonized
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    HK MP5 Brace and HKP Adapter - Skeletonized

    HKP HK Parts / SB Tactical

    $299.95
    SB Tactical Side Folding Brace For The HK MP5, SP5 model Each brace comes assembled ready to install no assembly required. This complete brace will come assembled with our own HK Parts stock adapter. CNC machined aircraft grade aluminum with QD sling...
    HKP-21055
    $299.95
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    $299.95
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  • On Sale
    New - HKP HK P30L Quick Detach Comp Weight™ Compensator - Black - HKP-18153 HK P30L Compensator - Quick Detach
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    HK P30L Compensator - Quick Detach

    HKP HK Parts

    Now: $98.95
    Was: $199.95
    HKP HK P30L Quick Detach Comp Weight™ Compensator Easy on, easy off - Quick Detach technology. The HK Parts P30L Comp Weight™ is the world's first quick detach Comp Weight™, compensator. That slides effortlessly onto your pistol frame...
    HKP-18153
    Now: $98.95
    Was: $199.95
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    Now: $98.95
    Was: $199.95
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  • New - Timney Triggers HK91/G3 .308 2-Stage Trigger - HKP-20508 HK91, G3 2-Stage Trigger
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    HK91, G3 2-Stage Trigger

    Timney Triggers

    $348.95
    Timney Trigger for - HK91, PTR 91 The Timney HK91 trigger is factory-set with a two pound first stage and a two pound second stage pull weight.  This offering comes complete with a factory German .308 ejector lever, ejector spring and ejector axle,...
    HKP-20508
    $348.95
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    $348.95
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  • New - GSG9 HK G36 FBI 0,1 Lower Complete - HKP-20181 GSG9 HK G36 FBI 0,1 Lower Complete
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    GSG9 HK G36 FBI 0,1 Lower Complete

    GSG9

    $399.95
    HK GSG9 G36, G36K, G36C - FBI (0,1) Lower New HK US FBI (0,1) G36 lower complete with internals. This is also a popular item for use on the SL8 to G36 conversions. Please note: Do NOT dry fire.
    HKP-20181
    $399.95
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    $399.95
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  • Used - H&K 91/G3 (7.62x51/.308) Backplate & Recoil Rod Assembly Complete - HKP-00355 HK91, G3 Backplate and Recoil Rod Assembly Complete
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    HK91, G3 Backplate and Recoil Rod Assembly Complete

    H&K Heckler & Koch

    $49.95
    HK German Backplate Assembly Complete: Excellent Refinished - German HK G3 backplate complete that has been refinished in black oxide. Great replacement for worn out or damaged backplates. Compatible With: G3 HK91 PTR 91  Custom clones   
    HKP-00355
    $49.95
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  • New - H&K G3 Standard Buffer Locking Plate - HKP-16982
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    HK G3 Standard Buffer Locking Plate

    H&K Heckler & Koch

    $1.49
    H&K G3 Standard Buffer Locking Plate This is the plate used with the large buffer screw in the standard buffer.
    HKP-16982
    $1.49
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    $1.49
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  • Out Of Stock
    New - HKP HK MP5 9mm Flash Hider - 3-Lug - HKP-17228 HK MP5, MP5K Flash Hider - 3-Lug - 9mm

    HK MP5, MP5K Flash Hider - 3-Lug - 9mm

    HKP HK Parts

    $99.95
    HKP HK MP5 9mm Flash Hider - 3-Lug Easily attaches to the end of any factory specification 9mm 3 lugged barrel. This flash hider does not require the of threads as it attached to the 3 lug tip. Also a great addition for any of 3 lug barrels found on in...
    HKP-17228
    $99.95
    Out Of Stock
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    $99.95
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  • New - HKP HK UMP, G36 Selector Lever - HKP-20180 HK UMP, G36 Selector Lever
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    HK UMP, G36 Selector Lever

    HKP HK Parts

    $8.95
    HK UMP & G36 Left Side Safety Selector Lever With Axle - Replacement selector for HK PARTS TRIGGER GROUP HK Parts selector lever for the left side of our own 2 position FBI U.S housing for the UMP pictogram lowers. Compatible With: U.S FBI 2...
    HKP-20180
    $8.95
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    $8.95
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  • New - SB Tactical HK UMP & B&T APC Side Folding Pistol Stabilizing Brace - Black - HKP-19133 HK UMP, B&T APC Side Folding Pistol Stabilizing Brace
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    HK UMP, B&T APC Side Folding Pistol Stabilizing Brace

    SB Tactical

    $74.95
    SB Tactical HK UMP Side Folding Pistol Stabilizing Brace A skeletonized version of the SBT Pistol Stabilizing Brace, the SBTi enhances your B&T APC or HK UMP with an integral, side-folding mechanism. The SBTi variant also allows you to customize the...
    HKP-19133
    $74.95
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    $74.95
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