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 Ambidextrous Sling Pin Locking Knob - HKP-01042
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    HK Ambidextrous Sling Pin Locking Knob

    H&K Heckler & Koch

    $11.95
    New HK German Ambidextrous Sling Pin Locking Knob These are common replacement items, they can become loose as the O-ring wears and falls off. Be sure to order extra O-rings to avoid losing the locking nut. This is a common replacement part for those...
    HKP-01042
    $11.95
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  • On Sale
    Used - H&K German Bayonet Adapter With Hardware - USED - BLEMISHED - HKP-00021-B HK Bayonet Adapter - W/O Screw and Hardware - German - USED
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    HK Bayonet Adapter - W/O Screw and Hardware - German - USED

    H&K Heckler & Koch

    Now: $109.95
    Was: $149.95
    H&K German Bayonet Adapter - W/O Screw & Hardware - USED   USED PARTS ARE FULLY FUNCTIONAL AND SOLD AS IS. THIS PART IS NOT ELIGIBLE FOR RETURN. ALL USED PART SALES ARE FINAL. DOES NOT COME WITH HARDWARE HK German Bayonet Adapter W/O Screw...
    HKP-00021-USED
    Now: $109.95
    Was: $149.95
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    Now: $109.95
    Was: $149.95
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  • New - H&K HK USP/USPC/P2000 Magazine Release Lever - Black - HKP-02480
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    HK USP, USP Compact, P2000 Magazine Release Lever

    H&K Heckler & Koch

    $12.95
    HK Magazine Release Lever Compatible With: HK USP .45 HK USP .40 HK USP 9mm HK USP Compact 9mm HK USP Compact .357 SIG HK USP Compact .40 HK USP Compact .45 HK USP Tactical, Elite, Expert both full size & compact HK P2000 9mm & .40/.357 HK...
    HKP-02480
    $12.95
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  • New - H&K HK 416 Enhanced Firing Pin/Retaining Pin - HKP-02658
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    HK416 Firing Pin Retaining Pin - Enhanced

    H&K Heckler & Koch

    $19.95
    HK 416 Firing Pin Retaining Pin- New Style This part is the newer style pin that is goldish, super hardened, and much less prone to wear and tear. The enhanced version is the most robust, easiest-to-use pin available. Compatible With: HK 416 AR15, M4...
    HKP-02658
    $19.95
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  • New - H&K UMP/USC (.40 S&W/.45 ACP/9mm) Recoil Buffer - HKP-00594
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    HK UMP/USC (.40 S&W/.45 ACP/9mm) Recoil Buffer

    H&K Heckler & Koch

    $20.95
    HK German USC & UMP Recoil Buffer Replaceable spare lower housing or buffer for buffer housings. This is a high wear and replacement item and a must-have for spare parts. Compatible With: HK USC .45 HK UMP models
    HKP-00594
    $20.95
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  • New - H&K HK G36, HK SL8 Ambidextrous Sling Pin - HKP-00619
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    HK G36, SL8 Ambidextrous Sling Pin

    H&K Heckler & Koch

    $49.95
    HK German G36/SL8 Ambidextrous Sling Pin This part replaces all of the HK SL8 or G36 push pins with a loop for the sling. This can be moved to attach a sling on either the left or right sides with ease.
    HKP-00619
    $49.95
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  • New - H&K VP9/VP9SK, VP40 Catch Pressure Spring - HKP-16800
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    HK VP9, VP9SK, VP40 Sear Spring

    H&K Heckler & Koch

    $9.95
    H&K VP9/VP9SK, VP40 Catch Pressure Spring Compatible With: HK VP9 HK VP9SK HK VP9A1 F, VP9A1 K HK VP40
    HKP-16800
    $9.95
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    $9.95
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  • New - H&K HK Mark 23 Ejector Roll Pin - HKP-01816
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    HK Mark 23 Ejector Roll Pin

    H&K Heckler & Koch

    $6.95
    HK Mark 23 Ejector Roll Pin The Mark 23 has been discontinued, and spare parts will become limited in time, so stock up now while we have these hard-to-find parts available.
    HKP-01816
    $6.95
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  • New - H&K HK VP9/VP9SK, HK VP40 Complete Trigger Bar Form Spring - HKP-16781 HK VP9, VP9SK, VP40 Trigger Bar Spring - Complete
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    HK VP9, VP9SK, VP40 Trigger Bar Spring - Complete

    H&K Heckler & Koch

    $51.95
    H&K HK VP9/VP9SK, HK VP40 Complete Trigger Bar Form Spring Compatible With: HK VP9 HK VP9A1 F HK VP9A1 K HK VP9SK HK VP40
    HKP-16781
    $51.95
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    $51.95
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  • New - H&K HK P30SK/P2000SK Hammer Spring - HKP-02598
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    HK P30SK, P2000SK Hammer Spring

    H&K Heckler & Koch

    $9.95
    HK German Hammer Spring  This spring is used with LEM and all standard models. Compatible With: P2000SK P30SK   
    HKP-02598
    $9.95
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  • New - H&K G36K Gas Piston Rod/Spring Assembly - HKP-00284
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    HK G36K Rod and Spring - Gas Piston - Assembly

    H&K Heckler & Koch

    $89.95
    New HK German G36K Gas Piston Rod/Spring Assembly Great for spare parts or to use on that HK SL8-G36 conversion.  
    HKP-00284
    $89.95
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    $89.95
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  • New - H&K UMP/USC (.40 S&W/.45 ACP/9mm) Cocking Lever - HKP-01884 HK UMP, USC Cocking Lever
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    HK UMP, USC Cocking Lever

    H&K Heckler & Koch

    $24.95
    HK UMP & USC Cocking Lever New HK German part. Compatible With: HK UMP HK USC
    HKP-01884
    $24.95
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    $24.95
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