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
    Used - H&K Push Pin Set - MP5, G3/91, 33/53/93 - HKP-00673
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    HK Push Pin Set - MP5, G3/91, 33/53/93

    H&K Heckler & Koch

    Now: $13.94
    Was: $15.49
    HK Set Of Two (One Large And One Small) Push Pins -Used These are great replacements or spare parts to keep on hand.  Compatible With: HK91 & G3 53, 33, and 93 MP5, SP5, SP89 PTR and GSG-5 family of guns. Please Note: The GSG5 will take...
    Now: $13.94
    Was: $15.49
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  • On Sale
    New - HKP HK .45 Barrel O-Ring All Caliber Pistols - Red - HKP-19316 HK .45 O-Ring - Barrel - Red
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    HK .45 O-Ring - Barrel - Red

    HKP HK Parts

    Now: $3.96
    Was: $4.95
    HKP HK .45 Barrel O-Ring All Caliber Pistols - Red A rare find as we have found a small lot of HK red-colored HK .45 O-rings.  All HK O-rings are still made of the same material as the newer black O- rings only in the HK red color. A great spare and...
    Now: $3.96
    Was: $4.95
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  • On Sale
    New - H&K MP5/K Bolt Group Backup Kit - Action 3 - HKP-16993
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    HK MP5, MP5K Bolt Group Backup Kit - Action 3

    H&K Heckler & Koch

    Now: $20.66
    Was: $22.95
    H&K MP5 Bolt Group Backup Kit - Action 3 This kit includes the highest wear and replace items on the MP5 action 3 bolt group, as well as the easy to lose pin. Includes: Factory German MP5 9mm Extractor Spring Factory German Action 3 Roller Retainer...
    Now: $20.66
    Was: $22.95
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  • On Sale
    New - Lazy Wolf HK VP/P30/USP/HK45 Enhanced Firing Pin Block Spring - HKP-18110
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    HK45, VP, P30, USP Block Spring - Enhanced Firing Pin

    Lazy Wolf

    Now: $8.96
    Was: $9.95
    Lazy Wolf HK VP/P30/USP/HK45 Enhanced Firing Pin Block Spring An exciting and desirable new offering as a joint collaboration from the widely renowned Master HK pistol smith Lazy Wolf Guns & HK Parts! This spring was designed by master pistol smith...
    Now: $8.96
    Was: $9.95
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  • On Sale
    New - H&K Barrel Retaining Pin - 5mm Standard Size - HKP-00071 HK Pin - Barrel - Retaining - 5mm - Standard Size
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    HK Pin - Barrel - Retaining - 5mm - Standard Size

    H&K Heckler & Koch

    Now: $8.96
    Was: $9.95
    H&K HK Pin - Barrel - Retaining - 5mm - Standard Size Barrel Retaining Pin Each barrel pin is used for installing a new or replacement barrel. HK suggest using a new factory barrel pin when installing or reinstalling a HK barrel. We also offer the HK...
    Now: $8.96
    Was: $9.95
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  • On Sale
    New - H&K HK Barrel O-Ring .45 ACP Caliber Pistols - Black - HKP-00296 HK .45 ACP O-Ring - Barrel
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    HK .45 ACP O-Ring - Barrel

    H&K Heckler & Koch

    Now: $4.46
    Was: $4.95
    Heckler and Koch .45 ACP Caliber Barrel O-Ring in Black A great spare and a much-needed part for your HK barrel. This factory part is a high-wear item, as the O-ring provides the seal between the slide and the barrel, which provides a secure lockup with...
    Now: $4.46
    Was: $4.95
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  • On Sale
    New - HKP Recoil Rod Guide Ring For Recoil Rod Assemblies - Enhanced - HKP-17829 HK Recoil Rod Guide Ring - Recoil Rod Assemblies - Enhanced
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    HK Recoil Rod Guide Ring - Recoil Rod Assemblies - Enhanced

    HKP HK Parts

    Now: $1.91
    Was: $2.39
    HKP Recoil Rod Guide Ring For Recoil Rod Assemblies - Enhanced New enhanced material for greater longevity and durability. Our US made recoil rod guides are the made from the strongest most durable material available much better than the basic nylon as...
    Now: $1.91
    Was: $2.39
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    Was: $2.39
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  • On Sale
    New - H&K HK P9/P9S Recoil Buffer - HKP-01449
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    HK P9/P9S Recoil Buffer

    HKP HK Parts

    Now: $15.96
    Was: $19.95
    HK P9S Recoil Buffer Fits All 9mm & 45 P9 & P9S Models This is a must-have replacement item as the buffer will degrade and fall apart with use and age. Replacing the P9 buffer is the most common wear and replacement part on the P9 series of...
    Now: $15.96
    Was: $19.95
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  • On Sale
    New - HKP HK 91/93/33/53/G3 (5.56/.223) & (7.62x51/.308) Hex Buffer Screw - Front - HKP-17883
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    HK33, HK53, HK93, HK91, G3 Hex Buffer Screw - Front

    HKP HK Parts

    Now: $0.55
    Was: $0.69
    Enhanced Hex Style Buffer Screw New upgraded hex head style front buffer screw. Each buffer assembly uses 2 of these screws to affix the buffer to the back plate and central stock section. The old style buffer screws were used the older slotted head and...
    Now: $0.55
    Was: $0.69
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  • On Sale
    New - H&K 93/53/91/G3 Cocking Handle Spring - HKP-00348
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    HK53, HK93, HK91, G3 Elbow Spring - Cocking Lever Support

    H&K Heckler & Koch

    Now: $5.17
    Was: $5.74
    New Style Cocking Handle Lever Spring - German   This is the latest HK German spring design with the factory HK anti-corrosion plating applied. The factory HK springs last longer and is more tolerant to corrosion. A perfect upgrade for your older...
    Now: $5.17
    Was: $5.74
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  • On Sale
    New - H&K Locking Roller Pin For Bolt Heads - HKP-00066 HK Locking Roller Pin - Bolt Head
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    HK Locking Roller Pin - Bolt Head

    H&K Heckler & Koch

    Now: $8.96
    Was: $9.95
    HK Heckler & Koch HK Pin - Roller - Locking - Bolt Heads   HK roller retainer pin or clamping sleeve (holds roller retainer plate in place). Each retainer pin works with all roller retainer plates & springs. All 3 types including oval-shaped...
    Now: $8.96
    Was: $9.95
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  • On Sale
    New - Lazy Wolf HK Reduced Power Hammer Spring - 10 lb. - HKP-18132
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    HK USP, P30, HK45 Hammer Spring - Reduced Power - 10 lb.

    Lazy Wolf

    Now: $8.96
    Was: $9.95
    Lazy Wolf HK Reduced Power Hammer Spring - 10 lb. An exciting new offering as a joint collaboration from the widely renowned pistol smith Lazy Wolf Guns & HK Parts! This custom spring was designed exclusively by master trigger smith Rick Holm at LWG...
    Now: $8.96
    Was: $9.95
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