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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  • On Sale
    New - RCM HK MP5 & MP5K 40/10 SD 120 Degree Locking Piece - HKP-21524 HK MP5SD, MP5K Locking Piece - 120 Degree - .40 S&W, 10mm
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    HK MP5SD, MP5K Locking Piece - 120 Degree - .40 S&W, 10mm

    RCM

    Now: $35.95
    Was: $44.95
    RCM HK MP5 & MP5K 40/10 SD 120 Degree Locking Piece Compatible With:  MP5, MP5K  MP5SD 
    HKP-21524
    Now: $35.95
    Was: $44.95
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  • On Sale
    Used - H&K HK P7M10 .40 S&W Magazine Follower Insert - USED - BLEMISHED - HKP-01364-B
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    HK P7M10 Magazine Follower Insert - .40 S&W - USED - BLEMISHED

    H&K Heckler & Koch

    Now: $19.95
    Was: $34.95
    H&K HK P7M10 .40 S&W Magazine Follower Insert - USED - BLEMISHED USED. COSMETICALLY BLEMISHED PARTS ARE FULLY FUNCTIONAL AND SOLD AS IS. THIS PART IS NOT ELIGIBLE FOR RETURN. ALL BLEMISHED PART SALES ARE FINAL.
    HKP-01364-B
    Now: $19.95
    Was: $34.95
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    Was: $34.95
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  • On Sale
    New - JMAC Universal Picatinny 8" Triangle Stock with 1913 Folding Mech - HKP-21245 Picatinny 8" Triangle Stock with 1913 Folding Mech
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    Picatinny 8" Triangle Stock with 1913 Folding Mech

    JMAC Customs

    Now: $233.95
    Was: $261.00
    JMAC Triangle Stock 8" Stock with 1913 Folding Mech Features: 2x Integrated QD Sling Socket 8" Length 0.275" Cheek Rise Drilled and tapped for optional cheek risers 7075 T6 Aluminum Hard-Coat Anodized **Not compatible w/LevTech Manufacturing panels...
    HKP-21245
    Now: $233.95
    Was: $261.00
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    Now: $233.95
    Was: $261.00
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  • On Sale
    Used - HK G3 - FMP Early Type Demilled Front End - HKP-20845 HK G3 - FMP Early Type Demilled Front End
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    HK G3 - FMP Early Type Demilled Front End

    FMP HK CONTRACT

    Now: $79.95
    Was: $99.95
    HK G3 - FMP Early Type Demilled Front End Early style G3 front end with no hanger. These are the perfect option for those doing custom builds. Good condition over all. Includes: Cocking tube Complete cocking handle assembly Trunnion Barrel pin
    HKP-20845
    Now: $79.95
    Was: $99.95
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  • On Sale
    New - TPM - Fluted Bolt Knob - Titanium - HKP-20769 Bolt Knob - Fluted - Titanium
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    Bolt Knob - Fluted - Titanium

    Tactical Precision MFG

    Now: $24.95
    Was: $48.99
    TPM - Fluted Bolt Knob - Titanium These bolt knobs can dress up any rifle with a 5/16×24 threaded bolt handle.  Features: Dimensions: 1.5" x 7/8" x 7/8" Weight: 2 oz. Material: titanium Threads: 5/16x24  
    HKP-20769
    Now: $24.95
    Was: $48.99
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  • On Sale
    New - HDPS HK USC, UMP Stock Block C Eyelet / Thumb Screw - HKP-20688 HK USC, UMP Stock Block C Eyelet with Thumb Screw
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    HK USC, UMP Stock Block C Eyelet with Thumb Screw

    HDPS

    Now: $152.95
    Was: $169.95
    HDPS HK USC, UMP Stock Block C Eyelet / Thumb Screw Great option since factory HK UMP stocks are hard to find and expensive. The HDPS HK USC/UMP stock block "C." Each unit comes with eyelet / thumb screw design. This is the type for use with the ACE...
    HKP-20688
    Now: $152.95
    Was: $169.95
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    Was: $169.95
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  • Out Of Stock
    New - XS Sight Systems R3D Night Sights - Orange - HKP-19935 R3D Night Sights - Orange

    R3D Night Sights - Orange

    XS Sights

    $112.95
    XS Sight Systems R3D Night Sights - Orange R3D Night Sights feature traditional 3-dot tritium, notch and post, sight picture. The tritium front sight comes equipped with our proprietary photoluminescent orange or green Glow Dot, which absorbs ambient...
    HKP-19935
    $112.95
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  • Out Of Stock
    On Sale
    New - KDG HK MR556 13.75" M-LOK Rail System - Black - HKP-19244 HK416, MR556 Rail System - 13.75" - M-LOK, Picatinny

    HK416, MR556 Rail System - 13.75" - M-LOK, Picatinny

    KDG Kinetic Development Group

    Now: $259.95
    Was: $399.95
    Rail System - 13.75" - M-LOK - HK MR556 The New KDG HK 556 M-LOK rails are direct mount rail system, replacing the factory HK 556 rail systems. These new rails are identical in design to their big brother, the KDG HK 762 M-LOK Rail system. Like the 762...
    HKP-19244
    Now: $259.95
    Was: $399.95
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  • On Sale
    New - HKP HK33 11" LH Cocking Tube - HKP-18892 HK33 Cocking Tube - 11" - Left Hand
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    HK33 Cocking Tube - 11" - Left Hand

    HKP HK Parts

    Now: $79.95
    Was: $99.95
    HKP HK33 11" Left Hand Cocking Tube This is the one and only left handed cocking tube for the HK33 cocking tube made in the US. Made to the exact HK specifications as the factory HK33 German cocking tube. Overall length is 11".
    HKP-18892
    Now: $79.95
    Was: $99.95
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  • Out Of Stock
    New - B&T TP9 130mm 9mm Barrel - Black - HKP-17305

    B&T TP9 Barrel - 9mm - 130mm

    B&T Brugger & Thomet

    $449.95
    Swiss B&T manufactured 130mm TP9 9mm Barrel Assembly Factory B&T replacement barrel for the TP9. Made in Switzerland. Compatible With: B&T TP9
    HKP-17305
    $449.95
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    $449.95
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  • On Sale
    New - L.A.G. Tactical HK VP9SK The Defender IWB/OWB LH Holster - Black - HKP-18717 HK VP9SK Holster - The Defender IWB, OWB- LH
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    HK VP9SK Holster - The Defender IWB, OWB- LH

    L.A.G. Tactical

    Now: $47.95
    Was: $59.95
    L.A.G. Tactical HK VP9SK The Defender IWB/OWB LH Holster The Defender is known for being lightweight and comfortable. The easily interchangeable belt loops take you seamlessly from your outside the waistband range set up, to your highly concealable...
    HKP-18717
    Now: $47.95
    Was: $59.95
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  • On Sale
    New - Comp-Tac HK VP40 MTAC Holster - Black - HKP-17466-M HK VP40 Holster - MTAC
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    HK VP40 Holster - MTAC

    Comp-Tac

    Now: $47.95
    Was: $94.95
    Comp-Tac HK VP40 MTAC Holster The MTAC is an inside the waistband Kydex and leather hybrid holster designed for concealed carry. Created to be worn behind the hip at 4:00 or 5:00, this holster offers the best in comfort and speed for concealed carry use...
    HKP-17466-M
    Now: $47.95
    Was: $94.95
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    Now: $47.95
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