HK Rifle / SMG Parts

HK Rifle / SMG Parts

Elevate Your HK Rifle with Premium Parts – MP5, HK416, SP5, and More!

Enhance your HK rifle with top-notch parts and accessories. From HK MP5 and HK MP5K to HK SP5 and HK UMP or HK USC, we offer a vast selection. Discover high-quality magazines, binary triggers, stocks, grips, barrels, handguards, sights, and more for your firearm. Whether you own an HK416, HK SP5K, HK G36, or HK MP5 22, we have the Heckler and Koch rifle parts you've been looking for. Shop now to upgrade your rifle to perfection.

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  • Used - H&K HK MP5K Slimline Forearm - Black - HKP-20275 HK MP5K Slimline Handguard
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    HK MP5K Slimline Handguard

    H&K Heckler & Koch

    $49.95
    H&K HK MP5K Slimline Forearm Used German military slimline forearm refinished in a  black cerakote . Cut down to fit the MP5k. These are rare items only offered here at HK Parts. Each item is in good to excellent shape. Compatible With: MP5K,...
    HKP-20275
    $49.95
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  • Used - H&K MIL-SPEC 416 OTB Buffer Tube & HK E1 Stock Combo - HKP-20104 HK416 OTB E1 Buttstock and Buffer Tube Set
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    HK416 OTB E1 Buttstock and Buffer Tube Set

    H&K Heckler & Koch

    $469.95
    H&K MIL-SPEC 416 OTB Buffer Tube & HK E1 Stock Combo Genuine HK416 E1 Stock with the new style marine environment "over the beach" buffer tube. Buffer tube has ball bearing rollers to tighten the stock when locked in position, and helps smooth...
    HKP-20104
    $469.95
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  • Used - H&K 10 Round HK 91, G3, PTR .308 Magazine - Used - HKP-19887 HK91, G3 Magazine - .308 - 10 Round - Used
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    HK91, G3 Magazine - .308 - 10 Round - Used

    H&K Heckler & Koch

    $64.95
    H&K 10 Round HK 91, G3, PTR .308 Magazine - Used Each HK magazine is made by using a factory German HK 20 round mag that is then professionally converted to 10 rounds. Perfect for shooting bench or prone as the 20 round magazines are to long and get...
    HKP-19887
    $64.95
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  • New - H&K HK USP Lanyard Loop Insert Pin - HKP-01930
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    HK USP Lanyard Loop Insert Pin

    H&K Heckler & Koch

    $19.95
    HK USP Lanyard Loop Insert Pin   Compatible With: HK USP 9mm HK USP 40 HK USP 45  
    HKP-01930
    $19.95
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  • New - Troy Industries Rear Battle Sight - Black - HKP-00032 Battle Sight - Rear
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    Battle Sight - Rear

    Troy Industries

    $129.95
    Troy Industries Rear Battle Sight Durability and dead-on accuracy have made the Troy Industries Folding Battle Sight one of the best choices for Special Ops and tactical users worldwide. Easy to install and deploy, with no levers or springs to fumble...
    HKP-00032
    $129.95
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  • New - H&K HK MR556/416 Extractor - HKP-00036 HK416, MR556 Extractor
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    HK416, MR556 Extractor

    H&K Heckler & Koch

    $64.95
    HK 416 & MR556 Bolt Head Extractor New HK - German Compatible With: HK MR556 HK 416 CR556 HK M27  
    HKP-00036
    $64.95
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  • New - H&K HK MR556/416 Ejector For Bolt Head - HKP-00037
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    HK416, MR556 Ejector For Bolt Head

    H&K Heckler & Koch

    $23.95
    H&K HK MR556/416 Ejector For Bolt Head HK German factory part.  Compatible With: HK MR556 HK 416
    HKP-00037
    $23.95
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  • New - H&K G36/SL8 (5.56/.223) Cocking Handle - HKP-01853
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    HK G36, SL8 Cocking Handle

    H&K Heckler & Koch

    $55.95
    HK Cocking Handle For G36 & SL8 Bolt Carriers  
    HKP-01853
    $55.95
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  • Out Of Stock
    New - H&K UMP (.40 S&W/.45 ACP/9mm) Lower Backplate - HKP-16473 HK UMP Lower Backplate

    HK UMP Lower Backplate

    H&K Heckler & Koch

    $34.95
    HK Heckler and Koch .40 S&W, .45 ACP, 9mm Lower Backplate for HK UMP HK German Backplate for all UMP lowers. You will need to add your existing buffer or order one to make a complete buffer assembly.
    HKP-16473
    $34.95
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  • New - HDPS HK UMP/USC/G36/SL8 (.40 S&W/.45 ACP/9mm/5.56/.223) Trigger - HKP-02134 HK UMP, USC, G36, SL8 Trigger
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    HK UMP, USC, G36, SL8 Trigger

    HDPS

    $139.95
    HDPS US-Made Steel Trigger - USC & SL8 HDPS US-made triggers are ideal for meeting US 922r compliance as this counts as one of the needed parts when converting the HK USC to HK semi-auto UMP and the HK SL8 to semi-auto G36. Compatible...
    HKP-02134
    $139.95
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  • New - H&K UMP/USC/G36/SL8 (.40 S&W/.45 ACP/9mm/5.56/.223) Safety Right Side (0,1) - HKP-01874
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    HK UMP, USC, G36, SL8 Safety - Right Side 0,1

    H&K Heckler & Koch

    $9.95
    Safe, Semi 0,1 Only HK UMP, USC, G36, & SL8 Right Side Safety Control Lever Constructed from durable black polymer, this factory original part from HK is made in Germany and specifically designed for H&K SL8, G36, and USC rifle. The lever...
    HKP-01874
    $9.95
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  • New - AIM HK 91/G3 (7.62x51/.308) Rifle Length Handguard - Keymod - HKP-18179 HK91, G3 Rifle Length Handguard - Keymod
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    HK91, G3 Rifle Length Handguard - Keymod

    AIM

    $89.95
    HK 91, G3, PTR RIFLE LENGTH HANDGUARD - KEY MOD This sleek streamlined design is an ultra low profile handguard with generous mounting space to accept all KeyMod accessories. Superior ergonomics and simple, drop-in installation makes this the best HK...
    HKP-18179
    $89.95
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