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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  • On Sale
    HK UMP Magazine Release - Enhanced - Billeted HK UMP Magazine Release - Enhanced - Billeted
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    HK UMP Magazine Release - Enhanced - Billeted

    HKP HK Parts

    Now: $31.95
    Was: $34.95
    HKP HK Parts Enhanced Paddle Magazine Release for HK UMP 9mm, .40 S&W, .45 ACP This is a very common replacement part as they are fairly easy to break on the UMP lower. With this new mag release, you'll get a wider release as well as a much more...
    HKP-18758
    Now: $31.95
    Was: $34.95
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    Was: $34.95
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  • On Sale
    New - HKP HK MR556/416 Extractor Spring Buffer - HKP-21604 HK416, MR556 Extractor Spring Buffer
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    HK416, MR556 Extractor Spring Buffer

    HKP HK Parts

    Now: $4.95
    Was: $5.39
    HKP HK MR556/416 Extractor Spring Buffer This buffer fits inside the extractor spring in the extractor pocked of the bolt. This item is a high wear item and a spare would be highly advised. Compatible With: HK MR556 & HK416 Firearms
    HKP-21604
    Now: $4.95
    Was: $5.39
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    Now: $4.95
    Was: $5.39
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  • On Sale
    New - HK417, MR762 Magazine Catch Retainer Ring - HKP-16521 HK417, MR762 Mag Catch Retainer Ring
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    HK417, MR762 Mag Catch Retainer Ring

    H&K Heckler & Koch

    Now: $9.95
    Was: $10.95
    Heckler and Koch Magazine Catch Retainer Ring for HK417 and HK MR762   Compatible With: H 417, MR762
    HKP-16521
    Now: $9.95
    Was: $10.95
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    Now: $9.95
    Was: $10.95
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  • On Sale
    New - HK G36/SL8 (5.56/.223) Cocking Handle Axle Pin - HKP-18367 HK G36, SL8 Cocking Handle Axle Pin - USA
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    HK G36, SL8 Cocking Handle Axle Pin - USA

    USA

    Now: $9.95
    Was: $10.95
    HK G36, SL8 Cocking Handle Axle Pin - US Made This is the rivet pin that is used to attach the swiveling cocking handle to the body of the carrier. These can be replaced as they break and wear. Compatible With: HK G36 models HK SL8 models
    HKP-18367
    Now: $9.95
    Was: $10.95
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  • Out Of Stock
    New - H&K 93/53/33 (5.56/.223) 25 Round Magazine Spring - HKP-00483

    HK33, HK53, HK93 Magazine Spring - 25 Round

    H&K Heckler & Koch

    $11.95
    HK 93, 33, & 53 Magazine Replacement Spring For 25-Round Magazines Hard to find and a must-have spare for your HK mags. No longer in production.
    HKP-00483
    $11.95
    Out Of Stock
    Qty in Cart: 0
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    $11.95
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  • On Sale
    New - HK P30/L Series Firing Pin - Black - HKP-02211
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    HK P30, P30L Firing Pin

    H&K Heckler & Koch

    Now: $53.95
    Was: $59.95
    Heckler and Koch Firing Pin for HK P30, P30L   German-made HK firing pin for the P30 and P30L. Steel construction, factory-spec, and designed for both 9mm and .40 S&W models. This is the correct OEM firing pin for restoring proper ignition...
    HKP-02211
    Now: $53.95
    Was: $59.95
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    Was: $59.95
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  • Out Of Stock
    Used - H&K A3 Retractable Stock Clamping Lever Spring - HKP-01089

    HK A3 Retractable Buttstock Clamping Lever Spring

    H&K Heckler & Koch

    $19.95
    HK German Retractable Stock Clamping Lever Spring For A3 Retractable Stocks This spring is the most common breakage/wear item in the internal workings of the A3 retractable stock.
    HKP-01089
    $19.95
    Out Of Stock
    Qty in Cart: 0
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    $19.95
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  • On Sale
    New - HKP 10 Round MP5 .22LR Magazine Spring - HKP-20297
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    HK MP5 Magazine Spring - .22LR - 10 Round

    HKP HK Parts

    Now: $2.95
    Was: $3.95
    HKP 10 Round MP5 .22LR Magazine Spring New fresh production mag spring for your HK MP5 .22 magazine. Please note: This spring can also be used to convert the 10 round magazine to a 10 round magazine. It has come to our attention that Walther has made...
    HKP-20297
    Now: $2.95
    Was: $3.95
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    Now: $2.95
    Was: $3.95
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  • On Sale
    New - H&K HK MR762/417/G28 Handguard Rail System Screw - Black - HKP-16601 HK416, MR556, HK417, MR762 Handguard Locking Screw
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    HK416, MR556, HK417, MR762 Handguard Locking Screw

    H&K Heckler & Koch

    Now: $15.95
    Was: $16.95
    HK416, MR556, HK417, MR762 - Handguard Locking Screw Replacement handguard locking screw that secures the handguard to the upper receiver.  Compatible With: HK HK416 HK MR556 HK HK417 (2 required per handguard) HK MR762 (2 required per handguard)
    HKP-16601
    Now: $15.95
    Was: $16.95
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    Now: $15.95
    Was: $16.95
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  • On Sale
    New - HKP MP5 40,10 Magazine Release Paddle Lever - HKP-01274 HK MP5 Paddle Magazine Release Lever - .40 S&W, 10mm
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    HK MP5 Paddle Magazine Release Lever - .40 S&W, 10mm

    HKP HK Parts

    Now: $50.95
    Was: $59.95
    HKP HK Parts Magazine Release Lever for .40 S&W and 10mm HK MP5  Compatible with MP5  
    HKP-01274
    Now: $50.95
    Was: $59.95
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    Now: $50.95
    Was: $59.95
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  • On Sale
    New - H&K MR556 A4 Hammer Spring - HKP-22083
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    HK MR556 A4 Hammer Spring

    H&K Heckler & Koch

    Now: $4.95
    Was: $5.95
    H&K MR556 A4 Hammer Spring Genuine H&K hammer spring for the MR556 A4. Compatible With: HK MR556 A4
    HKP-22083
    Now: $4.95
    Was: $5.95
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    Now: $4.95
    Was: $5.95
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  • On Sale
    New - H&K 417/MR762 A4 Bolt Catch/Release - Ambi - HKP-21960 HK417, MR762A4 Bolt Catch, Release - Ambi
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    HK417, MR762A4 Bolt Catch, Release - Ambi

    H&K Heckler & Koch

    Now: $48.95
    Was: $53.95
    Heckler and Koch MR762 A4 Bolt Catch/Release - Ambi Factory ambidextrous bolt catch lever for the MR762 A4.  The A4 variant of the MR762 introduced ambi controls for the bolt catch/release not previously available on the A1 variant...
    HKP-21960
    Now: $48.95
    Was: $53.95
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    Now: $48.95
    Was: $53.95
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