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, HK90 Series Sear Complete - Steel - Used Surplus
H&K Heckler & Koch
$12.95Heckler & Koch's Sear Catch Release - Complete for HKP 90, MP5K Trigger Packs - German - Used - Steel German HK Sear/Catch complete with installed detent, spring and roll pin. Used surplus in VG-EXC shape and in perfect working order and complete...HKP-18304$12.95 -
HK91, G3, HK33, HK53, HK93 Cocking Handle Spring
HKP HK Parts
$3.95HKP Cocking Handle Spring The cocking handle spring is a medium wear component and should be replaced intermittently. Grab a spare to keep with your maintenance gear in case of failure in the field too. Compatible With: HK G3, 91, PTR91 HK...HKP-02465$3.95 -
HK416, MR556, G36 Gas Piston - Complete
H&K Heckler & Koch
$50.95H&K HK MR556/MR762/416/417/G36/SL8 Complete Gas Piston New HK German gas piston assembly with three locking piston rings installed. This is a great spare part to have on hand, as the gas piston takes a lot of wear and tear. Compatible With: HK...HKP-00047$50.95 -
HK90 Series Front Sight Sling Loop - Used
H&K Heckler & Koch
$24.95HK German sling loop, eyebolt or triple frame retainer pin for front sight tower - Used This HK OEM item is used and pulled from demilled HK firearms. This is a must have item for all of your re-barrel jobs of for when you need to mount a sling loop to...HKP-17058$24.95 -
HK45, HK45C, USP Detent Plate V3, V4
H&K Heckler & Koch
$29.99Detent Plate For V3 & V4 Installing the V3/4 detent plate will configure the selector lever to de-cock only, thereby disabling the safety function. The V3/4 is a popular configuration to LE/MIL agencies around the globe as well as many concealed...HKP-01172$29.99 -
HK G36 Buttstock Axle Pin
H&K Heckler & Koch
$38.95G36 Stock Axle Pin For SL8 To G36 Stock Conversion New HK German manufacture. This is the axle pin that holds the G36 or G36C folding stock to the rear section of the receiver. Also used to mount the US-made rear stock block for those who are doing the...HKP-00741$38.95 -
HK416, MR556, G36, SL8 Piston Ring - Replacement Set of 3
H&K Heckler & Koch
$19.95HKP Gas Piston Ring Replacement Combo Set- 3 Rings The gas rings are prone to periodic breakage and wear and tear and require them to be replaced periodically. These are some of the most common breakage parts we see that need to be replaced on these...HKP-00048$19.95 -
HK45, USP Firing Pin Spring
H&K Heckler & Koch
$7.95H&K HK USP/45 Firing Pin Spring Compatible With: HK USP 9mm HK USP 40 HK USP 45 HK USP Tactical models HK USP Expert, HK Elite HK45, HK45 TacticalHKP-01080$7.95 -
HK416, MR556, G36, SL8 Piston Ring - Replacement Set of 3 - USA
HKP HK Parts
$8.95HK MR556, HK416 & G36, SL8 Gas Piston Ring Replacement Combo Set - 3 Rings This is a high wear common repair & replacement item. The gas rings are prone to periodic breakage & wear, tear and require them to be replaced periodically...HKP-17933$8.95 -
Out Of Stock
HK P Series LEM Elbow Spring
H&K Heckler & Koch
$6.95HK P Series LEM Elbow Spring Compatible With All LEM Models Below: HK P30 HK P30L HK P30SK HK P2000 HK P2000SKHKP-02498$6.95 -
HK MP5 Replacement Buffer For Folding Stock Or End Cap
Choate
$3.95Choate MP5 Replacement Buffer For Folding Stock Or End Cap Compatible With: Choate MP5 and MP5K Stocks or End Caps (NOT compatible with MP5 .22 LR)HKP-00116$3.95 -
HK VP9, VP40 Enhanced Magazine Release
HKP HK Parts
$49.95Enhanced Magazine Release - Alloy - HK VP Series The oversized magazine release increases the overall surface area and makes it possible to release the magazine without changing the position of your grip. Made in the USA from 6061 billeted aluminum...HKP-21099-M$49.95