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 Push Pin Set - MP5, G3/91, 33/53/93
H&K Heckler & Koch
$15.49HK 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...HKP-00673$15.49 -
Locking Roller - Plus and Minus Sizes
RCM
$8.95RCM Rollers, + & - Sizes RCM US-made locking rollers are available in both plus and minus sizes, making them the ideal choice for adjusting bolt gaps. These rollers are the top-tier locking rollers on the market, delivering unbeatable performance and...HKP-22094-M$8.95 -
HK Pistol Light Trigger Return Spring
H&K Heckler & Koch
$7.95HK Pistol Light Trigger Return Spring Great for LEM and standard variant conversions. Each spring should be used along with the light-firing pin block spring, as shown below in the related items. Compatible With: HK USP Full Size (9mm, .40 & .45) HK...HKP-02081$7.95 -
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 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 Retainer...HKP-16993$22.95 -
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 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 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 -
On Sale
HK MP5, MP5K Replacement Parts Kit
MKE
Now: $19.95Was: $24.95MKE Replacement Parts Kit for your HK MP5 and HK MP5K Firearm Keep your MP5 or MP5K in peak condition with this comprehensive MKE HK MP5/MP5K replacement parts kit. Manufactured to exacting standards by MKE, this kit includes high-quality replacement...HKP-21896Now: $19.95Was: $24.95 -
HK91, G3, HK53, HK93 Cocking Lever Elbow Spring
H&K Heckler & Koch
$5.74New 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...HKP-00348$5.74 -
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