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
HK45, USP, USPC LEM Conversion Kit - Complete
H&K Heckler & Koch
Now: $161.95Was: $179.95H&K Heckler & Koch HK45, USP, USPC Kit - LEM - Complete - Universal HK German "universal" LEM conversion kit for USP, USPC & HK45, and HK45C pistols. This kit converts your V1-V10 HK Pistol to the LEM configuration. Each LEM kit includes all...Now: $161.95Was: $179.95 -
On Sale
HK45, VP9, VP9SK, P30 Backstrap Clamping Pin
H&K Heckler & Koch
Now: $5.36Was: $5.95Dowel Pin Or Clamping Pin This HK roll pin is used to hold the backstrap in place. Compatible With: HK45 HK45 Compact HK P30 HK P30L HK P30SK HK VP9 HK VP9SKNow: $5.36Was: $5.95 -
On Sale
HK90 Series Magazine Catch Spring
H&K Heckler & Koch
Now: $4.46Was: $4.95Heckler and Koch Magazine Catch Spring for the HK90 Rifle Series New HK German manufacture, not used, worn out surplus springs. Perfect spare and a must-have mag catch spring for all 90 series rifles that use a detachable magazine. Compatible...Now: $4.46Was: $4.95 -
On Sale
HK416, MR556 - Spring - Enhanced Buffer
H&K Heckler & Koch
Now: $17.95Was: $19.95Enhanced HK German MR556 & 416 Buffer Spring The HK MR556/416 buffer spring will also work with other AR-15 and M-16 rifles. It is a high-wear item and a must-have replacement part. Compatible With: HK MR556 HK416 HK416 A5 HK M27 AR15, M4 & M16Now: $17.95Was: $19.95 -
On Sale
HK End Cap - Cocking Tube - Aluminum
HKP HK Parts
Now: $11.96Was: $14.95H&K Cocking Tube End Cap - Aluminum - US Made Made from weight-saving aircraft-grade aluminum alloy. Compatible With: All 90 series HK firearms and clones that use a triple frame/sight towerNow: $11.96Was: $14.95 -
On Sale
HK Full Auto Paddle Magazine Release Bushing
H&K Heckler & Koch
Now: $6.25Was: $6.95H&K Full Auto Paddle Magazine Release Bushing - New New HK German paddle magazine release bushing for all 90 series H&K weapon systems. Used for installing a paddle mag release. Please Note: This is NOT for use on semi-auto HK builds. This...Now: $6.25Was: $6.95 -
On Sale
HK VP9, VP9SK, VP40 Trigger Spring
H&K Heckler & Koch
Now: $3.56Was: $3.95H&K HK VP9/VP9SK, HK VP40 Trigger Return Spring HK German stock trigger return spring. A must have spare part as the factory spring will wear with use. The TRS can also be damaged upon install if the spring tool is not used to install. Please order...Now: $3.56Was: $3.95 -
On Sale
HK90 Series Sear and Trigger Axle
H&K Heckler & Koch
Now: $1.79Was: $1.99HK Sear & Trigger Axle For 90 Series- Used Surplus Condition HK German used sear and trigger axle for the 90 series style of trigger packs. Each axle pin or pivot pin measures .197 inches (5.0mm). A great spare and must have spare part for anyone...Now: $1.79Was: $1.99 -
On Sale
Semi Auto Shelf For Receiver - Billeted
Now: $17.95Was: $19.95Semi Auto Shelf For Receiver - Billeted HK Semi Auto Shelf milled from one solid billet to HK's factory specifications (no castings here). This is the needed receiver shelf that is welded to the receiver to allow the use of the clipped & pinned...Now: $17.95Was: $19.95 -
On Sale
HK Spring Clip
USA
Now: $1.75Was: $1.95Replacement Spring for HK style push pin - Small A must have replacement item to have on hand. A quick and easy install spring to get your push pins back to working condition. A great replacement for those worn out springs that come loose while in...Now: $1.75Was: $1.95 -
Out Of StockOn Sale
HK MP5, MP5K 9mm Extractor
RCM
Now: $26.95Was: $29.95RCM MP5 & MP5K 9mm Extractor Made from ordnance grade steel and heat treated. These are the latest F type extractor for all HK MP5/94 bolt heads. Perfect to get that out of spec clone or worn out HK bolt working as it should. Made in the USA, these...Now: $26.95Was: $29.95 -
On Sale
HK P Series Combat Defensive Action Upgrade For LEM 4.1 Pistols
H&K Heckler & Koch
Now: $80.95Was: $89.95H&K HK P Series Combat Defensive Action Upgrade For LEM 4.1 Pistols Found on all (European CDA) variant 4.1 models. This drop in LEM upgrade kit is a great trigger upgrade that reduces the trigger pre-travel by about 5mm or 1/3 of the original...Now: $80.95Was: $89.95