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 MP5SD Sealing Ring - Enhanced
HKP HK Parts
$9.95HKP HK Parts Enhanced Sealing Ring for HK MP5SD The enhanced sealing ring is made from a newer, longer-lasting material as well as having a sHKP-18053$9.95 -
HK Semi Auto Spacer with Elbow Spring - Match Grade
PTR
$11.95PTR Semi Auto Spacer With Elbow Spring - Match Grade For use on all HK semi-auto trigger packs. It's a must-have for those converting a full auto trigger pack to semi-auto. This unit provides a...HKP-00838$11.95 -
HK VP, USP, P30, P2000, HK45 Magazine Release Spring
H&K Heckler & Koch
$3.95Heckler and Koch Magazine Release Spring for all HK Pistols Compatible With: VP9HKP-01814$3.95 -
HK MP5, SP5K Firing Pin Spring
H&K Heckler & Koch
$9.95HK Heckler & Koch HK94, MP5 Spring - Firing Pin German Fits all of the MP5, SP5, SP5K, MP5K 9mm and 40/10 Variants including MP5, 94 clones. The firing pin is one of the most common repair and...HKP-00062$9.95 -
Out Of Stock
HK USP, HK45 Short Reset System
Grayguns
$90.00Grayguns HK USP, HK45 Short Reset System This Short Reset System for the HK USP and HK45 replicates the short reset conversion available at Grayguns. Cut from bar stock steel, these kits provide an...HKP-19753$90.00 -
HK MP5, SP5K Extractor Spring - 9mm
MKE
$6.95MKE HK MP5, MP5K - Extractor Spring - 9mm Extractor spring for all 9mm HK variants including clones. This spring is the #1 repair & replacement item for the MP5 and MP5K family of firearms...HKP-22481$6.95 -
HK UMP, USC Picatinny Rail Set - 4 Piece
HKP HK Parts
$149.95HK UMP, USC Rail Set Complete A complete set of rails for your HK UMP/USC featuring an extended top rail for mounting your optic of choice. The rails are scratch resistant, class 3 mil-spec hard...HKP-17429$149.95 -
HK MP5, HK94 Recoil Spring
H&K Heckler & Koch
$12.95HK German MP5, HK94 Recoil Rod Assembly Spring Great replacement and spare recoil spring as this is a common repair and replacement item. Compatible With: HK MP5HKP-01652$12.95 -
HK416, MR556 Gas Block Roll Pin
H&K Heckler & Koch
$5.95Heckler and Koch Gas Block Pin for HK416 and MR556 This is the retaining pin for an HK416 gas block.HKP-02534$5.95 -
HK MP5 A3 Telescopic Stock Buffer - USA
$7.74MP5 A3 Retractable Stock "H" Buffer For All HK A3 Retractable Stocks The A3 stock buffer is a high-wear and replacement item that needs replacement when torn, cracked, brittle, discolored, and worn...HKP-14012$7.74 -
HK MP5, HK94 Firing Pin Spring - Enhanced
HKP HK Parts
$4.95MP5 & HK94 Firing Pin Spring - Enhanced The "Enhanced" firing pin spring was analyzed and engineered from scratch with the latest in performance spring technology and an emphasis on reducing stress...HKP-02321$4.95 -
HK USP, P2000SK, HK45CT Match Trigger Return Spring
H&K Heckler & Koch
$8.95HK Pistol Match Trigger Return Spring This is the TRS that is in the Match trigger kit. This spring works better with the SA/DA and is lighter than the standard trigger return spring. This is...HKP-02666$8.95