Small Parts

Small Parts

Explore our extensive selection of HK small parts at HKParts, perfect for repairs, upgrades, and custom builds. Our inventory includes high-quality, precision-machined replacement parts and maintenance kits designed for a wide range of HK models. Whether you need push pins, springs, or custom components, our HK-specific small parts ensure optimal performance and durability for your firearm.

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  • New - HKP MP5SD Sealing Ring - Enhanced - HKP-18053

    HK MP5SD Sealing Ring - Enhanced

    HKP HK Parts

    $9.95
    HKP HK Parts Enhanced Sealing Ring for HK MP5SD The enhanced sealing ring is made from a newer, longer-lasting material as well as having a s
    HKP-18053
    $9.95
    Qty in Cart: 0
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    $9.95
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  • New - PTR Semi Auto Spacer With Elbow Spring - Match Grade - HKP-00838 HK Semi Auto Spacer with Elbow Spring - Match Grade

    HK Semi Auto Spacer with Elbow Spring - Match Grade

    PTR

    $11.95
    PTR Semi Auto Spacer With Elbow Spring - Match Grade   For use on all HK semi-auto trigger packs. It's a must-have for those converting a full auto trigger pack to semi-auto. This unit provides a...
    HKP-00838
    $11.95
    Qty in Cart: 0
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    $11.95
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  • New - H&K MP5 & HK94 Firing Pin Spring - HKP-00062

    HK MP5, SP5K Firing Pin Spring

    H&K Heckler & Koch

    $9.95
    HK Heckler & Koch HK94, MP5 Spring - Firing Pin German Fits all of the MP5, SP5, SP5K, MP5K 9mm and 40/10 Variants including MP5, 94 clones. The firing pin is one of the most common repair and...
    HKP-00062
    $9.95
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  • Out Of Stock
    New - Grayguns HK USP, HK45 Short Reset System - HKP-19753

    HK USP, HK45 Short Reset System

    Grayguns

    $90.00
    Grayguns HK USP, HK45 Short Reset System This Short Reset System for the HK USP and HK45 replicates the short reset conversion available at Grayguns. Cut from bar stock steel, these kits provide an...
    HKP-19753
    $90.00
    Qty in Cart: 0
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    $90.00
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  • HK MP5, SP5K Extractor Spring - 9mm HK MP5, SP5K Extractor Spring - 9mm

    HK MP5, SP5K Extractor Spring - 9mm

    MKE

    $6.95
    MKE HK MP5, MP5K - Extractor Spring - 9mm Extractor spring for all 9mm HK variants including clones. This spring is the #1 repair & replacement item for the MP5 and MP5K family of firearms...
    HKP-22481
    $6.95
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    $6.95
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  • New - HKP HK UMP/USC (.40 S&W/.45 ACP/9mm) 4 Piece Picatinny Rail Set - HKP-17429 HK UMP, USC Picatinny Rail Set - 4 Piece

    HK UMP, USC Picatinny Rail Set - 4 Piece

    HKP HK Parts

    $149.95
    HK UMP, USC Rail Set Complete A complete set of rails for your HK UMP/USC featuring an extended top rail for mounting your optic of choice. The rails are scratch resistant, class 3 mil-spec hard...
    HKP-17429
    $149.95
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    $149.95
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  • New - H&K MP5, HK94 Recoil Spring - HKP-01652

    HK MP5, HK94 Recoil Spring

    H&K Heckler & Koch

    $12.95
    HK German MP5, HK94 Recoil Rod Assembly Spring Great replacement and spare recoil spring as this is a common repair and replacement item. Compatible With: HK MP5
    HKP-01652
    $12.95
    Qty in Cart: 0
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  • New - H&K HK MR556/416 Gas Block Roll Pin - HKP-02534

    HK416, MR556 Gas Block Roll Pin

    H&K Heckler & Koch

    $5.95
    Heckler and Koch Gas Block Pin for HK416 and MR556 This is the retaining pin for an HK416 gas block.
    HKP-02534
    $5.95
    Qty in Cart: 0
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    $5.95
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  • New - Retractable Stock Buffer - MP5 A3 - USA - HKP-14012 HK MP5 A3 Telescopic Stock Buffer - USA

    HK MP5 A3 Telescopic Stock Buffer - USA

    $7.74
    MP5 A3 Retractable Stock "H" Buffer For All HK A3 Retractable Stocks The A3 stock buffer is a high-wear and replacement item that needs replacement when torn, cracked, brittle, discolored, and worn...
    HKP-14012
    $7.74
    Qty in Cart: 0
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    $7.74
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  • New - HKP MP5 & HK94 Firing Pin Spring - Enhanced - HKP-02321

    HK MP5, HK94 Firing Pin Spring - Enhanced

    HKP HK Parts

    $4.95
    MP5 & HK94 Firing Pin Spring - Enhanced The "Enhanced" firing pin spring was analyzed and engineered from scratch with the latest in performance spring technology and an emphasis on reducing stress...
    HKP-02321
    $4.95
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    $4.95
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  • New - H&K HK Pistol Match Trigger Return Spring - HKP-02666

    HK USP, P2000SK, HK45CT Match Trigger Return Spring

    H&K Heckler & Koch

    $8.95
    HK Pistol Match Trigger Return Spring This is the TRS that is in the Match trigger kit. This spring works better with the SA/DA and is lighter than the standard trigger return spring. This is...
    HKP-02666
    $8.95
    Qty in Cart: 0
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