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 - Evolution Gun Works HK USP Full Size Trijicon RMR-SRO, Holosun 407C-507C Mount - HKP-20042 HK USP Full Size Trijicon RMR-SRO, Holosun 407C-507C Mount
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    HK USP Full Size Trijicon RMR-SRO, Holosun 407C-507C 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 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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  • 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 Ambidextrous Sling Pin For Forearm - Small - HKP-00077
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    HK Pin - Sling for Handguard - 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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  • 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 - HKP HK Piston Ring Replacement Set - 3 Ring Combo - HKP-17933
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    HK416, MR556, G36, SL8 Piston Ring - Replacement Set of 3 - USA

    HKP HK Parts

    $8.95
    HK MR556, HK416 & G36, SL8 Gas Piston Ring Replacement Combo Set - 3 Rings This is a high wear common repair & replacement item. The gas rings are prone to periodic breakage & wear, tear and require them to be replaced periodically...
    $8.95
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  • New - H&K HK 45/45C Ambidextrous Control Lever Kit - Black - HKP-01154 HK45, HK45 Compact Ambidextrous Control Lever Kit
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    HK45, HK45 Compact Ambidextrous Control Lever Kit

    H&K Heckler & Koch

    $69.95
    Factory HK German Genuine HK45 & HK45C Ambidextrous Control Lever Kit A must-have upgrade for those who would like to have the ability of both left and right side control levers. Hard to find, easy to install as this is a drop-in part - no...
    $69.95
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  • New - HKP HK 21 (7.62x51/.308) Extended Style Cocking Handle - HKP-00363 HK21 Cocking Handle - Extended Style
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    HK21 Cocking Handle - Extended Style

    HKP HK Parts

    $69.95
    HK Extended Cocking Handle - HK21 Rubberized extended cocking handles for the older style HK21 firearms. This extended cocking handle makes a HUGE difference when trying to charge the HK21 firearm, as it has increased spring pressure and can be a pain to...
    $69.95
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  • New - H&K HK VP9/VP9SK, HK VP40 Clamping Sleeve For Drop Safety Axle - HKP-16838
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    HK VP9, VP9SK, VP40 Clamping Sleeve For Drop Safety Axle

    H&K Heckler & Koch

    $6.95
    Clamping Sleeve For Drop Safety Axle VP9, VP9SK & VP40 This is the roll pin that goes in the side of the slide and retains the drop safety.
    $6.95
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  • New - H&K HK USP/45 Firing Pin Spring - HKP-01080
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    HK45, USP Spring - Firing Pin

    H&K Heckler & Koch

    $7.95
    H&K HK USP/45 Firing Pin Spring Compatible With: HK USP 9mm HK USP 40 HK USP 45 HK USP Tactical models HK USP Expert, HK Elite HK45, HK45 Tactical
    $7.95
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