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
HK416, MR556 Retaining Spring - FFRS
HKP HK Parts
Now: $4.95Was: $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-21503Now: $4.95Was: $4.99 -
On Sale
HK45, USP, Mark 23 Barrel O-Ring - .45 ACP - Red
HKP HK Parts
Now: $3.95Was: $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-19316Now: $3.95Was: $4.95 -
On Sale
HK VP9, P30, HK45, USP Firing Pin Block Spring - Enhanced
Lazy Wolf
Now: $8.95Was: $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-18110Now: $8.95Was: $9.95 -
On Sale
HK MP5, MP5K Bolt Group Backup Kit - Action 3
H&K Heckler & Koch
Now: $20.95Was: $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-16993Now: $20.95Was: $22.95 -
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 -
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
$2.95HKP 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$2.95 -
On Sale
HK P9, P9S Recoil Buffer
HKP HK Parts
Now: $17.95Was: $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-01449Now: $17.95Was: $19.95 -
On Sale
HK Locking Roller Pin - Bolt Head
H&K Heckler & Koch
Now: $8.95Was: $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-00066Now: $8.95Was: $9.95 -
HK91, G3, HK53, HK93 Cocking Lever Elbow Spring
H&K Heckler & Koch
$5.95New 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$5.95 -
On Sale
HK USP, P30, HK45 Hammer Spring - Reduced Power - 10 lb.
Lazy Wolf
Now: $8.95Was: $9.95Lazy 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...HKP-18132Now: $8.95Was: $9.95 -
On Sale
HK USP, P30, HK45 Hammer Spring - Reduced Power - 11 lb.
Lazy Wolf
Now: $8.95Was: $9.95Lazy Wolf HK Reduced Power Hammer Spring - 11 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...HKP-18147Now: $8.95Was: $9.95