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 MP5K, SP5K Rear Push Pin Weldment Set
USA
$14.95HK MP5K, SP5K Rear Push Pin Weldment Set This weldment set is the 2 pieces needed for the rear of the flat/receiver that holds the stock/brace or end cap in place. CNC machined from weldable steel and the finest weldment available on the market...HKP-19632$14.95 -
HK USP Compact Recoil Spring with Captive Spring - 9mm
H&K Heckler & Koch
$113.95HK USP Compact 9mm Recoil Spring With Buffer Assembly Complete Great spare or replacement item to have as a spare. This is the new factory part for all HK USP9C Pistols.HKP-01158$113.95 -
HK416, HK417, MR556, MR762 Clamping Sleeve
H&K Heckler & Koch
$5.95H&K HK 416/417/MR556/MR762 Clamping Sleeve Compatible With: HK416 HK417 MR556 MR762HKP-16618$5.95 -
HK MP5 Reverse Stretch Recoil Assembly - 9mm
$37.95Complete Recoil Rod Assembly For The MP5 Reverse Stretch New US made MP5 reverse stretch or MP5 Full size compact recoil rod assembly complete micro polished and built of the finest materials to make the finest US made recoil assembly available. All...HKP-16580$37.95 -
HK MP5, MP5K, HK93, HK91 Handguard Bracket Screw - Tactical
PTR
$1.95PTR Tactical Handguard "U" Shaped Bracket Screw Replacement screw for the "U" shaped hangar on the tactical handguard. There are a total of 3 screws used, they are all the same for the MP5k, MP5, HK93 & HK91 tactical handguards. Great spare to have...HKP-17318$1.95 -
HK VP9, VP9SK, VP40 Firing Pin Return Spring
H&K Heckler & Koch
$9.95H&K VP9/VP9SK, VP40 Firing Pin Pressure Spring Compatible With: HK VP9/VP9SK HK VP9A1 F, VP9A1 K HK VP40HKP-16831$9.95 -
HK416, MR556 Ejector Port Cover Pin
H&K Heckler & Koch
$19.95HK MR556 & 416 Ejector Port Cover Pin Compatible With: HK MR556 HK 416HKP-02661$19.95 -
HK UMP, USC Cocking Lever Spring
H&K Heckler & Koch
$8.95HK UMP & USC Cocking Lever Spring A great spare part to have on hand.HKP-01886$8.95 -
HK416, MR556 FFRS Retaining Spring
H&K Heckler & Koch
$9.99H&K 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 have to be...HKP-02617$9.99 -
HK UMP, USC Firing Pin Spring
H&K Heckler & Koch
$9.95H&K UMP/USC (.40 S&W/.45 ACP/9mm) Firing Pin Spring This is a common wear and breakage item. This item also frequently becomes lost by end users when field stripping the UMP and USC Bolts. Compatible with: All HK UMP & USC FirearmsHKP-00262$9.95 -
HK G36, UMP Folding Stock Release Spring
H&K Heckler & Koch
$9.95HK G36 Folding Stock Release Spring This is the spring that fits under the stock release button to activate the folding and retention of the G36 or UMP stock. Compatible With: HK G36 HK G36K HK G36C UMPHKP-00637$9.95 -
HK Trip Lever - Friction
H&K Heckler & Koch
$24.95H&K Trip Lever - Friction This is the older friction-style trigger pack found on older HK trigger packs and all HK registered sear packs.HKP-02393$24.95