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/Tactical/Expert Complete Recoil Assembly - HKP-01160
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    HK USP, USP Tactical, USP Expert Complete Recoil Assembly

    H&K Heckler & Koch

    $94.95
    H&K HK USP/ Tactical/ Expert Complete Recoil Assembly Brand new factory German manufacture. Compatible With: HK USP 45 Tactical HK USP 45 Expert HK USP 45 Elite Tech Note: The USP Tactical recoil assembly can be used in a standard USP 45 without...
    $94.95
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  • New - H&K 91/G3 (7.62x51/.308) Firing Pin - HKP-00497
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    HK91, G3 Firing Pin

    H&K Heckler & Koch

    $19.95
    HK G3, HK91, PTR 762/.308 Firing Pin HK German, new factory part made from steel. Great for spares as this is a common wear item. Compatible With: HK G3 HK91 HK PTR CETME & C308
    $19.95
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  • New - Evolution Gun Works HEGW HK USP Full Size optic mount for Trijicon RMR SRO and Holosun with mounting hardware - HKP-20042 Evolution Gun Works HK USP Full Size rear dovetail optic mount plate for RMR SRO Holosun
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    HK USP Full Size Optic Plate - Trijicon RMR / SRO, Holosun 407C / 507C - Red Dot Pistol Mount

    Evolution Gun Works

    $49.95
    Evolution Gun Works HK USP Full Size Trijicon RMR-SRO, Holosun 407C-507C Mount Includes: Mounting hardware Features: Material: 7075 aluminum Coating: matte black hardcoat Overall length: 1.780" Overall width: 1.1" Mounting hardware: (2) 6-32...
    $49.95
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  • New - H&K HKVP9/VP9SK Right Side Charging Support - HKP-16826 HK VP9, VP9SK Right Side Charging Support
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    HK VP9, VP9SK Right Side Charging Support

    H&K Heckler & Koch

    $6.95
    H&K HKVP9/VP9SK Right Side Charging Support
    $6.95
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  • Used - H&K Trigger Pack Sear/Catch - Surplus - HKP-18304
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    HK90, MP5K Sear Catch - Steel - Used Surplus

    H&K Heckler & Koch

    $12.95
    Heckler & Koch's Sear Catch Release - Complete for HKP 90, MP5K Trigger Packs - German - Used - Steel German HK Sear/Catch complete with installed detent, spring and roll pin. Used surplus in VG-EXC shape and in perfect working order and complete...
    $12.95
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  • New - H&K HK VP9/45/P Series Extractor Spring - HKP-01501
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    HK45, VP9 Series Extractor Spring

    H&K Heckler & Koch

    $5.95
    HK VP9/45/P Series Extractor Spring A must-have repair and replacement part and a recommended part to change out when doing routine maintenance on your HK pistol. Compatible With: HK45 HK45C HK P30/P30L HK P30SK HK P2000 HK P2000SK HK VP9 HK VP9A1 F HK...
    $5.95
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  • New - HKP HK MP5/MP5K 4-Piece Set Magazine Release - HKP-00912 HK MP5, MP5K Magazine Release - 4-Piece Set
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    HK MP5, MP5K Magazine Release - 4-Piece Set

    HKP HK Parts

    $79.95
    HKP HK MP5/MP5K 4-Piece Set Magazine Release Each magazine catch set consists of 4 pieces and is a mixture of German HK and US-made parts. This is the set that provides left-to-right mag release controls. Each Set Includes: Mag catch (German) Push...
    $79.95
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  • New - HK Piston 3-Ring Replacement Set - HKP-00048
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    HK416, MR556, G36, SL8 Piston Ring - Replacement Set of 3

    H&K Heckler & Koch

    $19.95
    HKP Gas Piston Ring Replacement Combo Set- 3 Rings The gas rings are prone to periodic breakage and wear and tear and require them to be replaced periodically. These are some of the most common breakage parts we see that need to be replaced on these...
    $19.95
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  • New - H&K Ambidextrous Sling Pin For Forearm - Small - HKP-00077
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    HK Handguard Sling Pin - Ambi - Small

    H&K Heckler & Koch

    $61.95
    HK German Ambidextrous Small Sling Pin For Forearm This ambidextrous pin will allow the user to attach a sling hook to the sling pin. This will also allow the user to use the sling on either the left or right side.
    $61.95
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  • Out Of Stock
    New - HKP MP5 & MP5K 9mm Anti-Rattle Roller Tipped Paddle Magazine Release - HKP-17570 HK MP5, MP5K 9mm Anti-Rattle Roller Tipped Paddle Magazine Release

    HK MP5, MP5K 9mm Anti-Rattle Roller Tipped Paddle Magazine Release

    HKP HK Parts

    $29.47
    HK MP5, MP5K 9mm Anti-Rattle Roller Tipped Paddle Magazine Release Latest generation paddle mag release for all 9mm MP5, MP5K style builds. Made to the latest German specs, materials, and design.  Compatible With: MP5, 94 MP5K, SP89, SP5K Other...
    $29.47
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  • New - H&K HK USP, HK 45, HK 45C Detent Plate Variant 3 & 4 - HKP-01172
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    HK45, HK45C, USP Detent Plate Variant 3 & 4

    H&K Heckler & Koch

    $29.99
    Detent Plate For V3 & V4 Installing the V3/4 detent plate will configure the selector lever to de-cock only, thereby disabling the safety function. The V3/4 is a popular configuration to LE/MIL agencies around the globe as well as many concealed...
    $29.99
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  • New - H&K HK MR556/MR762/416/417/G36/SL8 Complete Gas Piston - HKP-00047
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    HK416, MR556, G36 Gas Piston - Complete

    H&K Heckler & Koch

    $50.95
    H&K HK MR556/MR762/416/417/G36/SL8 Complete Gas Piston New HK German gas piston assembly with three locking piston rings installed. This is a great spare part to have on hand, as the gas piston takes a lot of wear and tear. Compatible With: HK...
    $50.95
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