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
    New - B&T Bolt or Suppressor Pouch - Small - Velcro Mount - HKP-21886 Bolt or Suppressor Pouch - Small - Velcro Mount
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    Bolt or Suppressor Pouch - Small - Velcro Mount

    B&T Brugger & Thomet

    Now: $9.95
    Was: $19.95
    B&T Bolt or Suppressor Pouch - Small - Velcro Mount The B&T Bolt Pouch is a Velcro attaching pouch to securely hold and protect your .308 bolt during transport and field operations. Designed for the B&T APR338 bolt but will fit other,...
    Now: $9.95
    Was: $19.95
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    Now: $9.95
    Was: $19.95
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  • New - B&T Takedown Pin Rear - HKP-21727 B&T Takedown Pin Rear
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    B&T Takedown Pin Rear

    B&T Brugger & Thomet

    $12.95
    B&T APC Takedown Pin - Rear Factory B&T rear take down pin for the APC receiver. Compatible With: APC Series Standard receiver Glock receiver Sig receiver
    $12.95
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    $12.95
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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
    $10.95
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    $10.95
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  • New - H&K G36/SL8 (5.56/.223) Firing Pin Retaining Pin - HKP-02469 HK G36, SL8 Firing Pin Retaining Pin
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    HK G36, SL8 Firing Pin Retaining Pin

    H&K Heckler & Koch

    $10.95
    H&K G36/SL8 (5.56/.223) Firing Pin Retaining Pin Compatible With: HK G36 HK SL8
    $10.95
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  • Out Of Stock
    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
    $7.95
    Out Of Stock
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  • Out Of Stock
    Used - H&K USC/SL8 (.45 ACP/5.56/.223) Buttstock Screw - HKP-01649 HK USC, SL8 Buttstock Allen Screw

    HK USC, SL8 Buttstock Allen Screw

    H&K Heckler & Koch

    $12.95
    Buttstock Allen Screw For HK USC Or HK SL8 rifles. This is the screw that holds the stock assembly onto the upper receiver of the HK USC & SL8.Great for replacements or to have as spares. This item is factory HK and a common spare.
    $12.95
    Out Of Stock
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    $12.95
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  • Out Of Stock
    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...
    $274.95
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  • New - HKP HK MP5 (.40 S&W) Locking Roller -2 - HKP-17563
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    HKP HK MP5 (.40 S&W) Locking Roller -2

    HKP HK Parts

    $11.95
    HK US MP540 Undersized Locking Roller, -2 The proper roller size is essential for proper headspacing of bolt gap. Please Note: The price listed is per roller. Order 2 (pair) for a complete set for the bolt head. An easy way to remember the size you need...
    $11.95
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  • New - H&K VP Short Slide Release Lever - Left - HKP-22000 HK VP Short Slide Release Lever - Left
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    HK VP Short Slide Release Lever - Left

    H&K Heckler & Koch

    $49.00
    H&K VP Short Slide Release Lever - Left Short Left side slide release for VP series pistols. Can be combined with 260498, 50254710, 50239708. Compatible with: VP9/VP9 Tactical  VP9 Match VP9L VP9SK VP9K VP9 A1 VP40    
    $49.00
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    $49.00
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  • New - H&K MR762 A4 Pivot Pin - HKP-21958 HK417, MR762 Takedown Pin - Front - A4 Style
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    HK417, MR762 Takedown Pin - Front - A4 Style

    H&K Heckler & Koch

    $40.95
    H&K MR762 A4 Receiver Front Takedown Pin German-made factory pivot pin for the MR762 A4.  Will work with A1 models as well. Compatible With: HK MR762 A1 and A4 HK417  
    $40.95
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    $40.95
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  • On Sale
    New - H&K Elbow Spring Spacer For Full-Auto - USED - HKP-03330-USED HK MP5SF Bushing Sleeve - Elbow Spring with roller - USED
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    HK MP5SF Bushing Sleeve - Elbow Spring with roller - USED

    H&K Heckler & Koch

    Now: $2.96
    Was: $5.95
    HK MP5SF Bushing Sleeve - Elbow Spring with roller - USED   USED PARTS ARE FULLY FUNCTIONAL AND SOLD AS IS. THIS PART IS NOT ELIGIBLE FOR RETURN.  Features: Precision-machined elbow spring and roller used in traditional roller-delayed...
    Now: $2.96
    Was: $5.95
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    Now: $2.96
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  • New - B&T TP9/MP9 Extractor Spring - HKP-17300 B&T TP9, MP9 Extractor Spring
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    B&T TP9, MP9 Extractor Spring

    B&T Brugger & Thomet

    $9.95
    B&T TP9, MP9 Extractor Spring Swiss-manufactured TP9 and MP9 extractor spring. Compatible With: B&T TP9, MP9
    $9.95
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