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 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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  • New - H&K HK Mark 23 Ejector - HKP-01778 HK Mark 23 Ejector
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    HK Mark 23 Ejector

    H&K Heckler & Koch

    $13.95
    HK Mark 23 Ejector
    HKP-01778
    $13.95
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  • New - H&K HK USPC V3 Control Lever - HKP-01436 HK USP Compact V3 Control Lever
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    HK USP Compact V3 Control Lever

    H&K Heckler & Koch

    $32.95
    HK USPC V3 Control Lever Compatible With: HK USP Compact 9mm HK USP Compact 357 SIG HK USP Compact 40 S&W HK USP Compact 45 ACP
    HKP-01436
    $32.95
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  • New - H&K HK G36/SL8 Piston Rod Spring - HKP-01863
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    HK G36, SL8 Rod Spring - Gas Piston

    H&K Heckler & Koch

    $9.99
    HK G36 & SL8 Piston Rod Spring A must-have spare repair and replacement part. New HK German factory part. Compatible With: HK G36 HK SL8
    HKP-01863
    $9.99
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  • New - HK German Hand Stop Screw - HKP-16736
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    HK Ump, USC Handstop Screw - Cylindrical

    H&K Heckler & Koch

    $9.95
    HK German Hand Stop Screw     #21 Cylindrical screw, handstop 5 x 16 mm 219414
    HKP-16736
    $9.95
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  • Out Of Stock
    New - H&K 21 (7.62x51/.308) Countersunk Screw - 6x12MM - HKP-16424

    HK21 Countersunk Screw - 6x12mm

    H&K Heckler & Koch

    $4.95
    HK 21 Countersunk Screw - 6x12MM
    HKP-16424
    $4.95
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    $4.95
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  • New - H&K PSG1/MSG90 (7.62x51/.308) Ejector Lever - HKP-00537 HK PSG1, MSG90 Ejector Lever
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    HK PSG1, MSG90 Ejector Lever

    H&K Heckler & Koch

    $79.95
    Heckler and Koch Ejector Lever for HK PSG1, MSG90 German-made ejector lever for PSG1 and MSG90 platforms. Direct replacement part built to original factory-spec for reliable extraction and correct bolt head function. Compatible With: PSG1, MSG90
    HKP-00537
    $79.95
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  • HK MP5, G3, MKE AP5 Elbow Spring with Roller - Full-Auto HK MP5, G3, MKE AP5 Elbow Spring with Roller - Full-Auto
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    HK MP5, G3, MKE AP5 Elbow Spring with Roller - Full-Auto

    MKE

    $4.95
    MKE AP5, HK MP5, G3 Full-Auto Elbow Spring with Roller This elbow spring is manufactured by MKE from steel and is used in MP5 and G3 pattern trigger packs. It provides proper tension and function for the trigger pack elbow and is suitable for...
    HKP-22489
    $4.95
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  • HK MR556 A4 Hammer - Incomplete - Semi-Auto HK MR556 A4 Hammer - Incomplete - Semi-Auto
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    HK MR556 A4 Hammer - Incomplete - Semi-Auto

    H&K Heckler & Koch

    $43.95
    Heckler and Koch Hammer for HK MR556 Semi-Auto rifles Factory-original German steel hammer for MR556 A4 rifles. Designed as a direct replacement for worn or damaged hammers in MR556 A1 and A4 trigger assemblies. Compatible With: MR556A1 MR556...
    HKP-22384
    $43.95
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  • New - H&K HK P7/P9 Extractor - HKP-22236 H&K HK P7/P9 Extractor H&K Heckler & Koch HKP-22236
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    HK P7, P9 Extractor

    H&K Heckler & Koch

    $34.95
    H&K HK P7/P9 Extractor - Short / 7.65mm Removes spent casings from the chamber of H&K P7 and P9 pistols for reliable cycling. Compatible With: HK P7 K3  
    HKP-22236
    $34.95
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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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  • New - H&K CC9 Disconnector - HKP-22117
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    HK CC9 Disconnector

    H&K Heckler & Koch

    $13.95
    H&K CC9 Disconnector Made by H&K, this CC9 disconnector controls hammer release timing and prevents hammer follow during cycling. Compatible With: HK CC9  
    HKP-22117
    $13.95
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