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 UMP/USC (.40 S&W/.45 ACP/9mm) Slide For Lower - HKP-00268

    HK UMP, USC Conversion Slide

    H&K Heckler & Koch

    $19.95
    HK USC & UMP Slide For Lower - German New HK German USC slide for conversion of UMP lower. 
    HKP-00268
    $19.95
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    $19.95
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  • New - H&K 23E/13E Factory German Firing Pin - HKP-00820
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    HK23E, HK13E Firing Pin

    H&K Heckler & Koch

    $109.95
    H&K 23E/13E (5.56/.223) Factory German Firing Pin New HK23E & HK13E factory German firing pin. These firing pins are no longer in production from HK.  We have a limited number available and once they are gone, they are gone for good...
    HKP-00820
    $109.95
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  • New - H&K MR762 A4 1.0mm Gas Vent Screw - HKP-21954 HK MR762 A4 Gas Vent Screw - 1.0mm-2.5mm
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    HK MR762 A4 Gas Vent Screw - 1.0mm-2.5mm

    H&K Heckler & Koch

    $29.95
    Heckler and Koch MR762 A4 Gas Vent Screws German gas vent screw for MR762 A4 gas block. Specifications: Factory reference: 1.3mm is the common factory vent screw size for MR556 A4 Sizing reminder: Larger mm equals more venting, Smaller mm...
    HKP-21954-M
    $29.95
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    New - B&T Telescopic Stock End Cap - HKP-21721 B&T Telescopic Stock End Cap

    B&T Telescopic Stock End Cap

    B&T Brugger & Thomet

    $8.95
    B&T Telescopic Stock End Cap B&T replacement end cap for telescopic stocks.  Limits the extension of the stock to keep it from sliding out of the guides.
    HKP-21721
    $8.95
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  • New - H&K HK Mark 23 Magazine Release Spring - HKP-01789
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    HK Mark 23 Magazine Release Spring

    H&K Heckler & Koch

    $10.95
    HK Mark 23 Magazine Release Spring
    HKP-01789
    $10.95
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  • New - H&K HK MR556/MR762/417 Index Pin Spring - HKP-17021
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    HK417, MR556, MR762 Index Pin Spring

    H&K Heckler & Koch

    $7.95
    H&K HK MR556/MR762/417 Index Pin Spring   Compatible With: HK MR556 HK 417 HK MR762  
    HKP-17021
    $7.95
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  • New - H&K G36/SL8 (5.56/.223) Bolt Catch Spring - HKP-01861
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    HK G36, SL8 Bolt Catch Spring

    H&K Heckler & Koch

    $9.95
    HK German G36 & SL8 Bolt Catch Spring  
    HKP-01861
    $9.95
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    New - H&K UMP/USC/G36/SL8 (.40 S&W/.45 ACP/9mm/5.56/.223) Index Plate Compression Spring - HKP-16496

    HK UMP, USC, G36, SL8 Compression Spring - Index Plate

    H&K Heckler & Koch

    $7.95
    H&K UMP/USC/G36/SL8 (.40 S&W/.45 ACP/9mm/5.56/.223) Index Plate Compression Spring
    HKP-16496
    $7.95
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    New - MM HK 21 (7.62x51/.308) Belt Box Adapter - HKP-01844 HK 21 Ammunition Belt Box Adapter

    HK 21 Ammunition Belt Box Adapter

    Michaels Machines

    $274.95
    Belt Box Adapter A new custom-made adapter - allows you to use HK German factory HK21E belt boxes on the HK21 older style or original style belt feds. It is a drop-in design that will enable easy and quick use of the superior HK21E belt boxes...
    HKP-01844
    $274.95
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    $274.95
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    New - B&T APC Takedown Pin - Front - HKP-21737 B&T APC Takedown Pin - Front

    B&T APC Takedown Pin - Front

    B&T Brugger & Thomet

    $11.95
    B&T APC Takedown Pin - Front Factory B&T front take down pin for the APC receiver. Compatible With: APC Series Standard receiver Glock receiver Sig receiver
    HKP-21737
    $11.95
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    $11.95
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  • New - H&K VP9SK, VP40SK Backstrap - Small - Black - HKP-18306 HK VP9SK, VP40SK Backstrap - Small - Black
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    HK VP9SK, VP40SK Backstrap - Small - Black

    H&K Heckler & Koch

    $25.95
    H&K VP9SK, VP40SK Backstrap - Small - Black New HK German manufacture. Compatible With: HK VP9SK HK VP40SK
    HKP-18306
    $25.95
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    New - HKP HK MR762/417 Titanium Firing Pin - HKP-17768

    HK417, MR762 Firing Pin - Titanium

    HKP HK Parts

    $49.95
    HK MR762 & HK417 Firing Pin - Titanium Grade 6 weapons grade Titanium manufacture. Made  in the USA. A must have upgrade to have on hand as the firing pin is one of the most abused components in the HK MR 762 & HK417 weapon system. Get the...
    HKP-17768
    $49.95
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    $49.95
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