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 - H&K HK USP/USPC Old Style Hammer - HKP-02766 HK USP, USP Compact Old Style Hammer

    HK USP, USP Compact Old Style Hammer

    H&K Heckler & Koch

    $0.00
    HK USP & USPC Variants 1-4, 9, & 10 Old Style Hammer Compatible With: HK USP 9mm HK USP .40 S&W HK USP .45 ACP HK USP Compact 9mm HK USP Compact .40 S&W & .357 HK USP Compact .45 ACP Any USP pre-1995 with the old-style sear...
    HKP-02766
    $0.00
    Out Of Stock
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    $0.00
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  • New - H&K HK USP/45/45C Old Style Bobbed Hammer - HKP-14552
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    HK45, HK45 Compact, USP Old Style Bobbed Hammer

    H&K Heckler & Koch

    $64.95
    HK USP & USPC Bobbed Hammer - Older Style (without the cutout) This part is compatible with older USP full-size & USPC firearms that have the old-style hammer already. Perfect for those who prefer the shorter, lower profile "bobbed" hammer. This...
    HKP-14552
    $64.95
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    $64.95
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  • New - H&K HK G36 Left Side Safety Lever - HKP-01875
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    HK G36 Left Side Safety Lever

    H&K Heckler & Koch

    $24.95
    HK G36 Left Side Safety Selector Lever
    HKP-01875
    $24.95
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    $24.95
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  • New - H&K G36 (5.56/.223) 2 Round Burst Disconnector Axle - HKP-16350
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    HK G36 Disconnector Axle - 2 Round Burst

    H&K Heckler & Koch

    $10.95
    H&K G36 (5.56/.223) 2 Round Burst Disconnector Axle
    HKP-16350
    $10.95
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    $10.95
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  • New - HK UMP/USC/SL8/G36 (.40 S&W/.45 ACP/9mm/5.56/.223) Fixed Rear Sight Flat Spring - HKP-16635
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    HK UMP, USC, SL8, G36 Fixed Rear Sight Flat Spring

    H&K Heckler & Koch

    $8.95
    HK Heckler and Koch Fixed Rear Sight Flat Spring or Leaf Spring for HK G36, HK SL8 and HK USC, HK UMP Compatible With: G36 SL8 USC UMP
    HKP-16635
    $8.95
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    $8.95
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  • HK416, MR556, HK417, MR762 Cylindrical Head Screw HK416, MR556, HK417, MR762 Cylindrical Head Screw
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    HK416, MR556, HK417, MR762 Cylindrical Head Screw

    H&K Heckler & Koch

    $19.95
    Heckler and Koch Cylindrical Screw for MR762, HK417, MR556, HK416 Factory replacement cylindrical lens-head Allen screw for maintaining or repairing your HK417 and MR556 rifles with original-spec hardware. Compatible With: HK417, MR762 HK416, MR556
    HKP-22433
    $19.95
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    $19.95
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  • New - H&K CC9 Firing Pin Disconnect - HKP-22140
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    HK CC9 Firing Pin Disconnect

    H&K Heckler & Koch

    $5.95
    H&K CC9 Firing Pin Disconnect OEM firing pin disconnect for the H&K CC9 pistol. Controls firing pin engagement during the firing cycle. Compatible With: HK CC9    
    HKP-22140
    $5.95
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  • Out Of Stock
    New - KNS Precision HK Push Button Take Down Pin - Small - HKP-21389 HK MP5, HK33, HK91 Take Down Pin - Push Button - Small

    HK MP5, HK33, HK91 Take Down Pin - Push Button - Small

    KNS Precision

    $24.99
    KNS Precision HK Push Button Take Down Pin - Small .234" This 6mm (.234") diameter take-down pin has a spring-loaded push button. When the button is depressed, the stainless steel keeper detents retract for easy pin removal. The pin is designed to...
    HKP-21389
    $24.99
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    $24.99
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  • Used - H&K HK SL8-1 Incomplete Locking Lever - HKP-16367 HK SL8-1 Locking Lever Housing - Incomplete
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    HK SL8-1 Locking Lever Housing - Incomplete

    H&K Heckler & Koch

    $9.95
    H&K HK SL8-1 Incomplete Locking Lever
    HKP-16367
    $9.95
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    $9.95
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  • New - H&K HK MR762 Drop Safety Catch Pin - HKP-16617
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    HK MR762 Drop Safety Catch Pin

    H&K Heckler & Koch

    $4.95
    H&K HK MR762 Drop Safety Catch Pin   Compatible With: HK MR762
    HKP-16617
    $4.95
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    $4.95
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  • New - H&K HK Mark 23 Sear Spring - HKP-01630
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    HK Mark 23 Sear Spring

    H&K Heckler & Koch

    $11.99
    HK Mark 23 Sear Spring
    HKP-01630
    $11.99
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    $11.99
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  • New - H&K HK Mark 23 Secondary Recoil Compression Spring - HKP-16642
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    HK Mark 23 Secondary Recoil Compression Spring

    H&K Heckler & Koch

    $19.95
    H&K HK Mark 23 Secondary Recoil Compression Spring
    HKP-16642
    $19.95
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    $19.95
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