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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  • On Sale
    New - HKP HK MR556/CR556/MR762 H-Key 14 Rail Segment - HKP-17846 HK MR556, MR762 H-Key 14 Rail Segment
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    HK MR556, MR762 H-Key 14 Rail Segment

    HKP HK Parts

    Now: $17.95
    Was: $39.95
    HKP HK MR556/CR556/MR762 H-Key 14 Rail Segment 14 slot rail segment for the new "HKey" style forearms. This rail section is designed to fit and attach to any of the new HKey style forearms now being shipped on the MR556, CR556, MR762 and similar models...
    HKP-17846
    Now: $17.95
    Was: $39.95
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    Now: $17.95
    Was: $39.95
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  • New - H&K HK G36 Rubber Optical Sight Cover - HKP-16377 HK G36 Optical Sight Rubber Cover
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    HK G36 Optical Sight Rubber Cover

    H&K Heckler & Koch

    $10.95
    H&K HK G36 Rubber Optical Sight Cover
    HKP-16377
    $10.95
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  • Out Of Stock
    New - HK UMP/USC (.45 ACP) Extractor - HKP-02623 HK UMP, USC Extractor - .45 ACP

    HK UMP, USC Extractor - .45 ACP

    $39.95
    HK UMP & USC .45 Extractor Perfect for spares as they are prone to breakage and are a common wear item. Please Note: HK considers this a high wear and replacement item. Once removed from the carrier, the spring tension is compromised,...
    HKP-02623
    $39.95
    Out Of Stock
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  • Out Of Stock
    New - PTR HK G3/91 (7.62x51/.308) GI Barrel - Threaded 5/8x24 - HKP-18435 HK91, G3 Barrel - 7.62 / .308 - 18" - Threaded 5/8x24

    HK91, G3 Barrel - 7.62 / .308 - 18" - Threaded 5/8x24

    PTR

    $214.95
    PTR HK G3/91 (7.62x51/.308) GI Barrel - Threaded 5/8x24 New PTR91 US made G.I. spec 18" barrel. Perfect for any barrel threaded 5/8x24. New production perfect for new builds. This part counts as one US made compliant part. Specifications: Overall Lenght...
    HKP-18435
    $214.95
    Out Of Stock
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  • New - H&K 91/G3 (7.62x51/.308) Rear Sight - HKP-00361 HK91, G3 Rear Sight
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    HK91, G3 Rear Sight

    H&K Heckler & Koch

    $28.95
    HK German Factory Rear Sight Assembly With Drum Assembly - New Each rear sight is a brand new, old stock genuine Heckler & Koch rear sight. Comes as shown. Mounting hardware is offered separately. Now out of production, it's rare and hard to find in...
    HKP-00361
    $28.95
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    $28.95
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  • Out Of Stock
    New - RCM MP5K/SP5K/SP89 9mm Barrel - Non-Threaded 3-Lug - HKP-01764 HK MP5K, SP5K, SP89 Barrel - 9mm - 5.85" - 3 Lug

    HK MP5K, SP5K, SP89 Barrel - 9mm - 5.85" - 3 Lug

    RCM

    $149.95
    RCM MP5K/SP5K/SP89 9mm Barrel - Non-Threaded 3-Lug This is the only US-made non-threaded barrel that uses the same steel and Cold Hammer Forged (CHF) process as Heckler & Koch. Precision-milled to the latest MP5KN PDW specifications with...
    HKP-01764
    $149.95
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  • HK416, MR556 ARC-Fire with Geissele Trigger - 3-Position - Ambi Controls HK416, MR556 ARC-Fire with Geissele Trigger - 3-Position - Ambi Controls
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    HK416, MR556 ARC-Fire with Geissele Trigger - 3-Position - Ambi Controls

    AS Designs

    $689.95
    HK416, MR556 A4 3-Position ARC-Fire with Geissele*** Trigger and 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...
    HKP-22435
    $689.95
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    $689.95
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  • Out Of Stock
    HK MP5K, SP5K Super Safety Lower HK MP5K, SP5K Super Safety Lower

    HK MP5K, SP5K Super Safety Lower

    AS Designs

    $649.95
    AS Designs Super Safety Lower for the HK MP5K & SP5K Platform The ASD Super Safety Lower allows for faster follow-up shots by resetting after each shot.  This is a true drop-in trigger and housing assembly featuring SEMI, SUPER, and SAFE...
    HKP-22386-M
    $649.95
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    $649.95
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  • On Sale
    Refurbished - HK91, G3 7.62x51 / .308 15 Round Steel Magazine - Refinished - BLEMISHED - HKP-21922-B HK91, G3 Magazine - 15 Round - Refinished, BLEMISHED
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    HK91, G3 Magazine - 15 Round - Refinished, BLEMISHED

    H&K Heckler & Koch

    Now: $44.95
    Was: $84.95
    Heckler and Koch 15 Round Steel Magazine, Refinished and marked BLEMISHED, for HK91, G3 7.62x51 / .308  MAGAZINE BODIES HAVE PITTING - CONDITION MAY VARY COSMETICALLY BLEMISHED PARTS ARE FULLY FUNCTIONAL AND SOLD AS IS. THIS PART IS NOT ELIGIBLE FOR...
    HKP-21922-B
    Now: $44.95
    Was: $84.95
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    Now: $44.95
    Was: $84.95
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  • New - H&K HK MR556 A4 Gas Block - Complete - HKP-21928 HK MR556 A4 Gas Block - Complete
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    HK MR556 A4 Gas Block - Complete

    H&K Heckler & Koch

    $237.95
    H&K HK MR556 A4 Gas Block - Complete Factory HK MR556 A4 adjustable gas block ideal for switching between suppressed and unsuppressed firing.   Compatible With: HK MR556 A4 Nefarious Arms A5 barrels NOT compatible with MR556 A1 without...
    HKP-21928
    $237.95
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    $237.95
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  • New - Zenith 30 Round HK MP5 Supersonic Labeled Magazine - HKP-20830 HK MP5, SP5, MP5K, SP5K Magazine - 30 Round - 9mm - Supersonic Boom Boom
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    HK MP5, SP5, MP5K, SP5K Magazine - 30 Round - 9mm - Supersonic Boom Boom

    Zenith

    $43.95
    Zenith 30 Round HK MP5 Supersonic Labeled Magazine Easily identify a magazine loaded with supersonic rounds versus a magazine loaded with subsonic rounds. Features: Durable electro-plated black finish for exceptional corrosion resistance All steel...
    HKP-20830
    $43.95
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  • New - HKP Picatinny Rail Mount for Front Sight Tower - Red - HKP-20800 Picatinny Optic Mount, Front Sight Tower - Red
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    Picatinny Optic Mount, Front Sight Tower - Red

    $39.95
    HKP Picatinny Rail Mount for Front Sight Tower - Red HK Picatinny rail mount that replaces the forearm (small) push pin and mounts to the side of the front sight tower and allows you to add sling swivels, lasers, lights & accessories. This add on is...
    HKP-20800
    $39.95
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