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 G36/SL8/MP7 Gas Block Pin - HKP-16727
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    HK MP7, G36, SL8 Gas Block Pin

    H&K Heckler & Koch

    $8.95
    H&K HK G36/SL8/MP7 Gas Block Pin The G36/SL8/MP7 gas block pin is the largest out of HK's line up (UMP/USC, 415/MR556, 417/MR762).
    HKP-16727
    $8.95
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  • New - H&K Grip Screw - HKP-01725
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    HK MP5, SP89, HK91, HK93, HK94 Grip Screw

    H&K Heckler & Koch

    $8.95
    H&K Grip Screw New HK grip screw that is now out of production. Great for a spare. Compatible With: HK91 HK93 HK94 SP89
    HKP-01725
    $8.95
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  • New - H&K HK VP9/VP9SK, VP40 Trigger Stop Bolt - HKP-16784
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    HK VP9, VP9SK, VP40 Trigger Stop Bolt

    H&K Heckler & Koch

    $14.95
    H&K HK VP9/VP9SK, VP40 Trigger Stop Bolt Stop Bolt for Trigger VP9, VP40. Compatible With: HK VP9 HK VP9SK HK VP40 HK VP9A1 F HK VP9A1 K
    HKP-16784
    $14.95
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  • New - H&K UMP/USC (.40 S&W/.45 ACP/9mm) Lower Axle - HKP-01893
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    HK UMP, USC Lower Axle

    H&K Heckler & Koch

    $9.95
    HK UMP & USC Lower Axle - German 3 X lower axle pins are used for each trigger group or lower all pins are the same size, except the mag release axle on the USC model. 
    HKP-01893
    $9.95
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  • New - H&K SP5K 9mm Drop In Paddle Mag Release Upgrade Kit - HKP-18082 HK SP5K 9mm Drop In Paddle Mag Release Upgrade Kit
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    HK SP5K 9mm Drop In Paddle Mag Release Upgrade Kit

    H&K Heckler & Koch

    $129.95
    German HK SP5K Anti-Rattle Roller Tipped Paddle Magazine Release Kit No modifications, no refinishing...complete drop-in kit included New HK German & USA made paddle mag release kit for the HK SP5K. This kit will allow any end-user to quickly...
    HKP-18082
    $129.95
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  • New - H&K HK P7M8/P7M13 Piston Retaining Roll Pin - HKP-16435
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    HK P7M8, P7M13 Retaining Roll Pin - Gas Piston

    H&K Heckler & Koch

    $4.95
    HK P7 M8, M13 Piston Retaining Roll Pin
    HKP-16435
    $4.95
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  • New - H&K HK P30SK Firing Pin Safety Pin - HKP-18524 HK P30SK Firing Pin Safety Pin
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    HK P30SK Firing Pin Safety Pin

    H&K Heckler & Koch

    $4.95
    H&K HK P30SK Firing Pin Safety Pin This is a factory original HK part manufactured in Germany.
    HKP-18524
    $4.95
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  • New - B&T Ambidextrous Sling Pin - Small - HKP-16886 B&T Ambidextrous Sling Pin - Small
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    B&T Ambidextrous Sling Pin - Small

    B&T Brugger & Thomet

    $58.95
    B&T Ambidextrous Sling Pin - Small Replaces the small push pin to allow a sling attachment point on either the left or right side of the firearm. Each measures: 6x29mm with rubber o-ring and net screw.
    HKP-16886
    $58.95
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  • New - H&K VP9, HK VP40 Backstrap - Small - Black - HKP-16814 HK VP9, P40 Backstrap - Small
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    HK VP9, P40 Backstrap - Small

    H&K Heckler & Koch

    $29.95
    Heckler and Koch Small Black Backstrap for HK VP9, HK VP40 New HK German manufacture. Compatible With: VP9 VP40 VP9F VP9K
    HKP-16814
    $29.95
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  • New - HKP HK MP5 9mm Magazine Locking Plate - Red - HKP-18303 HK MP5 Magazine Locking Plate - 9mm - Red
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    HK MP5 Magazine Locking Plate - 9mm - Red

    HKP HK Parts

    $7.95
    HKP HK MP5, MP5K 9mm Magazine Locking Plate - HK Red Teflon infused glass filled polymer red colored locking plate that will work with all HK MP5, MP5K 9mm curved magazines. A drop in item that allows you to swap the locking plate to a red unit. A great...
    HKP-18303
    $7.95
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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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  • New - H&K Trigger Pack Ejector Lever Axle - HKP-01091 HK Trigger Pack Ejector Lever Axle
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    HK Trigger Pack Ejector Lever Axle

    H&K Heckler & Koch

    $19.95
    H&K Trigger Pack Ejector Lever Axle HK German ejector lever axle pin for all HK trigger packs. This is the factory correct axle pin that holds the ejector lever in place in the trigger pack. Fits all SEF & Ambidextrous style HK trigger packs...
    HKP-01091
    $19.95
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