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
HK Retaining Ring - Flash Hider
H&K Heckler & Koch
Now: $1.34Was: $1.49HK Flash Hider Retaining Ring Brand new HK German manufacture. HK flash hider, muzzle break retaining ring. This item is the ring that fits inside the flash hider that indexes with the splines of the HK barrel to provide a positive lockup of...Now: $1.34Was: $1.49 -
On Sale
HK Rod Rivet - Recoil Guide - Used
H&K Heckler & Koch
Now: $0.43Was: $0.48H&K German Recoil Guide Rod Rivet-Used This rivet holds the stop pin and recoil spring captive and in place to the recoil rod itself. Compatible With: G3, 91, 33, 93, 53 MP5, 94 MP5K SP89 HK21 variantsNow: $0.43Was: $0.48 -
On Sale
HK P Series LEM Elbow Spring
H&K Heckler & Koch
Now: $6.25Was: $6.95HK P Series LEM Elbow Spring Compatible With All LEM Models Below: HK P30 HK P30L HK P30SK HK P2000 HK P2000SKNow: $6.25Was: $6.95 -
On Sale
HK VP9, VP40 Spring Bushing - Washer
H&K Heckler & Koch
Now: $8.96Was: $9.95H&K HK VP9, HK VP40 Half Shell Spring Washer 2 units needed for complete set. Brand new factory German HK. This item is the item that cradles the firing pin and is covered by the firing pin sleeve and spring assembly. Compatible With: HK VP9 HK...Now: $8.96Was: $9.95 -
On Sale
HK Rear Sight Bearing
H&K Heckler & Koch
Now: $1.79Was: $1.99H&K Rear Sight Bearing Factory HK Part for all rear sight assemblies. This item is required for any HK diopter rear sight assemblies.Now: $1.79Was: $1.99 -
On Sale
HK SEF & Navy 3 Position Trigger Spring - Surplus
H&K Heckler & Koch
Now: $4.46Was: $4.95HK 90 Series SEF & Navy Style Trigger Return Spring - Surplus For HK 90 series (semi or full-auto). This item will fit any NON-burst trigger pack. Compatible With: MP5, MP5K, SP89, & SP5K HK G3, HK91, PTR HK 93, 33, HK33K, & HK53 Other HK 90...Now: $4.46Was: $4.95 -
On Sale
HK UMP Lower Locking Pin - 9mm / .40 S&W / .45 ACP
HKP HK Parts
Now: $10.36Was: $12.95HK UMP Lower Locking Pin, Push Pin For use with all HK UMP lowers & USC to UMP conversions. Made in the USA. This is the pin that holds the lower to the receiver. Compatible With: UMP USC Conversions TBT builds Omega Other builds that...Now: $10.36Was: $12.95 -
On Sale
HK G3 Large Buffer Screw
H&K Heckler & Koch
Now: $1.75Was: $1.95HK G3 Large Buffer Screw This is the screw that screws in the back of the buffer. This is also needed to install the Magpul PRS2 stock. Used- in good, working condition.Now: $1.75Was: $1.95 -
On Sale
HK45, VP9, P30, P2000 Rubber Extractor Buffer
H&K Heckler & Koch
Now: $5.36Was: $5.95HK P Series and HK45 Rubber Extractor Buffer A must-have wear and replacement part for the following HK pistols. Compatible With: HK P2000 HK P2000SK HK P30 HK P30SK HK45 HK45 Compact HK VP9 HK VP9A1 F HK VP9A1 K HK VP9SKNow: $5.36Was: $5.95 -
On Sale
HK USP, Mark 23 Recoil Assemblies Snap Ring
H&K Heckler & Koch
Now: $5.36Was: $5.95H&K HK USP/Mark 23 Recoil Assemblies Snap Ring The snap ring secures the spring onto the recoil buffer spring assembly. This part can come loose and become lost or easily worn. Once you remove them, HK suggests replacing them with a new snap ring...Now: $5.36Was: $5.95 -
On Sale
HK MP5, MP5K Spare Parts Kit
H&K Heckler & Koch
Now: $215.95Was: $239.95H&K HK MP5, MP5K Spare Parts Kit HK MP5, HK SP5, HK94 & MP5K, SP89, SP5K Spare parts kits for the most commonly worn parts needed to keep your precious MP5/MP5K going. This offering also includes a pouch to safely store all your replacement parts...Now: $215.95Was: $239.95 -
On Sale
HK90, MP5 Series Roller Locking Plate - Original Style
H&K Heckler & Koch
Now: $39.56Was: $43.95New HK German Roller Retainer Plate For Rollers Original-style roller locking plate. This item is a common wear item that is great to have on hand as they are one of the top items that break or fail with use. Compatible With: HK MP5*** HK...Now: $39.56Was: $43.95