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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HK MP5, MP5K Hammer Spring - 9mm
H&K Heckler & Koch
$6.89HK Heckler & Koch HK MP5, MP5K Spring - Hammer - 9mm Each factory HK hammer spring will work in all 9mm & 40/10 trigger packs. Do not settle for an HK contract when you can have HK German for less. Great upgrade for all of the clones that use the...HKP-00064$6.89 -
HK USP, P30, P2000 Hammer Spring - Light
HKP HK Parts
$8.95HKP HK USP/P30/P2000 Light Hammer Spring Finally a New US Production 10 lb. Hammer Spring For HK USP, P30 & P2000. Brought about by many customers asking for a 2 lb. lighter hammer spring than stock (12 lb.). This is also a popular hammer spring used...HKP-16489$8.95 -
HK German Roller Retainer Plate For Rollers
H&K Heckler & Koch
$7.95HK German Roller Retainer Plate For All Rollers - Used This item is a common wear item that is great to have on hand as they are one of the top items that break or fail with the use and age of the service weapon. Compatible With All Original 1st...HKP-02690$7.95 -
HK416, MR556 Retaining Spring - FFRS
HKP HK Parts
$4.99HKP HK MR556/HK416 FFRS Retaining Spring The retainer spring retains the handguard locking pin on the free floating rail system (FFRS). These can become damaged with the removal of the handguard screws. Once the spring is damaged, they require...HKP-21503$4.99 -
HK45, USP, Mark 23 Barrel O-Ring - .45 ACP - Red
HKP HK Parts
$4.95HKP 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...HKP-19316$4.95 -
HK VP9, P30, HK45, USP Firing Pin Block Spring - Enhanced
Lazy Wolf
$9.95Lazy 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...HKP-18110$9.95 -
HK MP5, MP5K Bolt Group Backup Kit - Action 3
H&K Heckler & Koch
$22.95H&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...HKP-16993$22.95 -
HK Barrel Pin Retaining - 5mm - Standard Size
H&K Heckler & Koch
$9.95H&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...HKP-00071$9.95 -
HK Recoil Rod Guide Ring - Recoil Rod Assemblies - Enhanced
HKP HK Parts
$2.39HKP 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...HKP-17829$2.39 -
HK MP5, MP5K Extractor - 9mm - Enhanced
HKP HK Parts
$34.95HK MP5, MP5K 9mm Extractor - Latest Generation Style HK Parts offers the finest US made 9mm "F" type extractor for all HK MP5/94 bolt heads. CNC'd from a solid billet of ordnance grade steel for superior function & durability. Each 9mm extractor has...HKP-01968$34.95 -
HK Locking Roller Pin - Bolt Head
H&K Heckler & Koch
$9.95HK 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...HKP-00066$9.95 -
HK P9, P9S Recoil Buffer
HKP HK Parts
$19.95HK 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...HKP-01449$19.95