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 A3 Stock Release Lever Rebuild Kit - HKP-21851
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    HK A3 Stock Release Lever Rebuild Kit

    H&K Heckler & Koch

    $14.95
    H&K A3 Stock Release Lever Rebuild Kit This A3 collapsible stock rebuild kit is designed for the release lever on MP5, SP5, 93/53/33, and G3/91 collapsible stocks.  With A3 stocks becoming more expensive it's a great idea to keep this kit on...
    HKP-21851
    $14.95
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    $14.95
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  • New - H&K HK MR762 Drop Safety Catch - HKP-16615 HK MR762 Drop Safety Catch
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    HK MR762 Drop Safety Catch

    H&K Heckler & Koch

    $19.95
    H&K HK MR762 Drop Safety Catch Compatible With: HK MR762
    HKP-16615
    $19.95
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    $19.95
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  • New - H&K HK MR762/417 Hammer Axle - HKP-16622
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    HK417, MR762 Hammer Axle

    H&K Heckler & Koch

    $13.95
    H&K HK MR762/417 Hammer Axle   Compatible With: HK MR762 HK 417
    HKP-16622
    $13.95
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    $13.95
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  • Out Of Stock
    New - H&K HK P7 Series Cocking Lever Axle - HKP-01375

    HK P7 Series Cocking Lever Axle

    H&K Heckler & Koch

    $7.95
    Cocking Lever Axle Compatible With: P7M8 P7M10 P7M13
    HKP-01375
    $7.95
    Out Of Stock
    Qty in Cart: 0
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    $7.95
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  • New - H&K HK Mark 23 Left Side Safety Lever - HKP-01771 HK Mark 23 Left Side Safety Lever
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    HK Mark 23 Left Side Safety Lever

    H&K Heckler & Koch

    $44.95
    HK Mark 23 Left Side Safety Lever  
    HKP-01771
    $44.95
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    Qty in Cart: 0
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    $44.95
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  • New - H&K HK Mark 23 Grip Insert - HKP-01595
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    HK Mark 23 Grip Insert

    H&K Heckler & Koch

    $19.99
    HK Mark 23 Grip Insert
    HKP-01595
    $19.99
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    $19.99
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  • New - H&K HK USP/45 V5/6/7 Tube - Black - HKP-02163
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    HK45, USP V5, V6, V7 Tube

    H&K Heckler & Koch

    $5.95
    HK USP/45 Variants 5, 6, & 7 Tube Compatible With: HK USP 9mm HK USP 40 S&W HK USP 45 ACP HK USP Compact 9mm HK USP Compact 357 HK USP Compact 40 HK USP Compact 45
    HKP-02163
    $5.95
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    Qty in Cart: 0
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    $5.95
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  • Out Of Stock
    New - H&K HK VP40/USPC 9mm/.40 S&W Extractor - HKP-01130 HK VP40, USP Compact 9mm, .40 S&W Extractor

    HK VP40, USP Compact 9mm, .40 S&W Extractor

    H&K Heckler & Koch

    $42.95
    H&K HK VP40/USPC 9mm/.40 S&W Extractor New HK German factory OEM part. Compatible With: HK VP40 (Not for the VP9) HK USP Compact 9mm HK USP Compact 40 & .357 HK USP LEM models
    HKP-01130
    $42.95
    Out Of Stock
    Qty in Cart: 0
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    $42.95
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  • On Sale
    HK Handguard Sling Pin - Ambi - Small - USED HK Handguard Sling Pin - Ambi - Small - USED
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    HK Handguard Sling Pin - Ambi - Small - USED

    H&K Heckler & Koch

    Now: $42.95
    Was: $61.95
    HK Handguard Sling Pin - Ambi - Small - USED VARYING CONDITION SHOWN - SOLD INDIVIDUALLY USED PARTS ARE SOLD AS IS. THIS PART IS NOT ELIGIBLE FOR RETURN. ALL USED PART SALES ARE FINAL. This ambidextrous pin will allow the user to attach a sling hook to...
    HKP-00077-USED
    Now: $42.95
    Was: $61.95
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    Now: $42.95
    Was: $61.95
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  • HK MP5, AP5 Full Auto Sear Spring Spacer HK MP5, AP5 Full Auto Sear Spring Spacer
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    HK MP5, AP5 Full Auto Sear Spring Spacer

    MKE

    $1.95
    MKE Distance Sleeve for HK MP5 and AP5 Features: Precision-machined roller used in traditional roller-delayed trigger packs. Ensures perfect trigger geometry, smooth operation, and long-lasting reliability. Compatible With: HK MP5  Century...
    HKP-22477
    $1.95
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    $1.95
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  • New - H&K 21E/23E Left Receiver Reinforcement Rail Weldment - HKP-21907 HK21E, HK23E Left Receiver Reinforcement Rail Weldment
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    HK21E, HK23E Left Receiver Reinforcement Rail Weldment

    H&K Heckler & Koch

    $14.95
    H&K 21E/23E Left Receiver Reinforcement Rail Weldment Genuine German-made weldment for left-side receiver reinforcement rail. Precision-machined using the correct steel and milling for you HK21E or HK23E build. Compatible With: HK21E HK23E
    HKP-21907
    $14.95
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    $14.95
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  • On Sale
    HK Cocking Tube End Cap - Dust Cap - BLEMISHED HK MP5, HK91, G3, HK33 Cocking Tube End Cap - Incomplete - BLEMISHED
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    HK MP5, HK91, G3, HK33 Cocking Tube End Cap - Incomplete - BLEMISHED

    H&K Heckler & Koch

    Now: $21.95
    Was: $39.95
    H&K Cocking Tube End Cap/Dust Cap - BLEMISHED SOLD INDIVIDUALLY - VARYING CONDITION SHOWN INCOMPLETE COSMETICALLY BLEMISHED PARTS ARE FULLY FUNCTIONAL AND SOLD AS IS. THIS PART IS NOT ELIGIBLE FOR RETURN. ALL BLEMISHED PART SALES ARE FINAL. This part...
    HKP-00099-B
    Now: $21.95
    Was: $39.95
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    Now: $21.95
    Was: $39.95
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