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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  • New - H&K HK21E/23E Hammer & Strut Assembly - HKP-21855 HK21E, HK23E Hammer, Strut Assembly
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    HK21E, HK23E Hammer, Strut Assembly

    H&K Heckler & Koch

    $339.95
    H&K HK21E/23E Hammer & Strut Assembly This original HK hammer and pinned strut assembly is sourced directly from Germany, providing the correct replacement or perfect upgrade for your HK21E or HK23E. Most U.S. HK21E/23E-style firearms are...
    HKP-21855
    $339.95
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    $339.95
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  • New - JMac Customs 360HD 1/2-28 FD Facemount KeyMount (KeyMicro) - HKP-21825 HK416, MR556 Facemount KeyMount (KeyMicro) - 360HD 1/2-28 FD
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    HK416, MR556 Facemount KeyMount (KeyMicro) - 360HD 1/2-28 FD

    JMAC Customs

    $124.95
    JMac Customs 360HD 1/2-28 FD Facemount KeyMount (KeyMicro) The JMac Customs 360HD is a high-performance muzzle device designed for superior durability, recoil mitigation, and compatibility with suppressors. Engineered with 360° ports for optimal...
    HKP-21825
    $124.95
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    $124.95
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  • New - B&T HK MP5/SP5/G36 Helmet Stock Cheek Support - HKP-21684 HK MP5, SP5, G36 Helmet Stock Cheek Support
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    HK MP5, SP5, G36 Helmet Stock Cheek Support

    B&T Brugger & Thomet

    $168.00
    B&T Brugger and Thomet Helmet Stock Cheek Support for HK MP5, HK SP5, and HK G36 B&T cheek support for B&T helmet stocks. Compatible With: MP5, MP5K SP5, SP5K G36  
    HKP-21684
    $168.00
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    $168.00
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  • 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

    $44.95
    RCM HK MP5 & MP5K 40/10 SD 120 Degree Locking Piece Compatible With:  MP5, MP5K  MP5SD 
    HKP-21524
    $44.95
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  • New - HKP MP5 Parts Kit - Tactical Package - HKP-21495 HK MP5 Parts Kit - Tactical Package
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    HK MP5 Parts Kit - Tactical Package

    HKP HK Parts / Heckler & Koch

    $2,199.95
    HKP MP5 Parts Kit Tactical package Vintage flavor with modern flare. Our team set out to strike a symbiotic balance of classic MP5 with modern accessories delivered at an affordable price.  The result is a build kit comprised of vetted components...
    HKP-21495
    $2,199.95
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    $2,199.95
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  • 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

    $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
    $261.00
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    $261.00
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  • 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

    $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
    $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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  • 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

    $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
    $169.95
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    $169.95
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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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  • 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

    $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
    $99.95
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    $99.95
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  • Used - Refinished HK MP5K Slimline Forearm - OD Green - HKP-20498 HK MP5K, SP5K Slimline Handguard - OD Green - Refinished
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    HK MP5K, SP5K Slimline Handguard - OD Green - Refinished

    H&K Heckler & Koch

    $39.95
    Refinished HK MP5K Slimline Forearm - OD Green Refinished German military OD green slimline forearm with heat shield, modified to fit the MP5K. Available exclusively at HK Parts. Compatible With: MP5K, SP5K
    HKP-20498
    $39.95
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