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 MP5, MP5K - Extractor Spring - 9mm
H&K Heckler & Koch
Now: $9.86Was: $10.95Heckler & Koch HK MP5, MP5K - Extractor Spring - 9mm This extractor spring will fit all of the 9mm HK variants including clones. This part is German HK factory manufactured and made to the tightest of specifications and tolerances and will provide a...Now: $9.86Was: $10.95 -
On Sale
HK MP5, MP5K Extractor Spring
H&K Heckler & Koch
Now: $4.46Was: $4.95FMP MP5, MP5K Extractor Spring New old stock HK contract FMP extractor spring will fit all of the 9mm HK variants including clones. This part was made using HK prints on HK contract tooling that the German HK factory manufactured for the Portuguese...Now: $4.46Was: $4.95 -
On Sale
HK Rifle Extractor Spring - Universal
H&K Heckler & Koch
Now: $6.07Was: $6.74HK German 308/7.62 & 556/.223 Rifle Extractor Spring New factory HK German part. The extractor spring is the number 1 replaced item on HK firearms. Many HK gunsmiths recommend upgrading MP5/94 series HK's with this longer/stronger silver spring vs...Now: $6.07Was: $6.74 -
On Sale
HK Spring - Ejector Lever
H&K Heckler & Koch
Now: $6.25Was: $6.95H&K Ejector Lever Spring The new HK German factory ejector lever spring fits all HK 90 series of rifles and pistols. This is a common repair and replacement part and it is a recommended spare part for every HK enthusiast or shooter. Compatible...Now: $6.25Was: $6.95 -
On Sale
HK Push Pin - Handguard with Lower - Small
H&K Heckler & Koch
Now: $8.05Was: $8.95H&K HK Push Pin - Forearm with Lower - Small Push Pin All steel HK German small push pin for use on the lower grip housing. The small push pin is also the correct pin for holding the HK forearm in place. Compatible With: HK91, HK G3, PTR HK93, 33,...Now: $8.05Was: $8.95 -
Out Of StockOn Sale
HK MP5, SP5 Ejector Lever - 9mm - Gen 3
H&K Heckler & Koch
Now: $53.96Was: $59.95H&K Heckler & Koch's HK Ejector Lever - 9mm - Gen 3 - Latest 3rd Generation The German latest generation ejector has all of the upgrades and improvements made since the MP5 was introduced over 50 years ago. Fits all of the HK 9mm...Now: $53.96Was: $59.95 -
On Sale
HK Spring - Roller Holder - Retainer - Action 3
H&K Heckler & Koch
Now: $6.07Was: $6.74H&K Heckler & Koch HK Spring - Roller Holder - Retainer - Action 3 Roller Retainer Spring Second-generation roller holder. Each retainer fits all Action 3 9mm MP5 & MP5K bolt heads & MP5 40/10 bolt heads. The roller retainer spring...Now: $6.07Was: $6.74 -
On Sale
HK Pistol O-Ring - .45 ACP Barrel - Green
H&K Heckler & Koch
Now: $4.46Was: $4.95O-Ring for .45 caliber barrels HK introduced O-rings with the HK Mark 23 and HK USP 45 Tactical pistols. Features: Original green color no longer in production Same high-temperature rubber as the newer black O-rings Factory part that provides the seal...Now: $4.46Was: $4.95 -
On Sale
HK Small Push Pin - Handguard & Lower
USA
Now: $6.83Was: $7.59HK Small push pin - US Made All steel small push pin for use on the lower grip housing for a push pin style of lower housing. Black nitride finish which adds extra durability to the pin plus corrosion and abrasion resistance. The small push pin is also...Now: $6.83Was: $7.59 -
On Sale
HK German Roll Pin
H&K Heckler & Koch
Now: $2.66Was: $2.95HK German Roll Pin German HK roll pin is crafted from a process using rolled spring steel resulting in robust part with stable fitment. HK suggests replacing the roll pin with a new unit each time it is removed. Fits and retains the extractor, mag...Now: $2.66Was: $2.95 -
On Sale
HK45 Compact, USP, P2000 Extended Magazine Release
H&K Heckler & Koch
Now: $26.95Was: $29.95HK 45C/USP/P2000 Extended Magazine Release This mag release makes it possible to release the magazine without changing the position of your grip. Compatible With All HK Pistols In All Calibers 45, 40, 357, & 9mm: HK 45C All HK USP Tactical, Elite,...Now: $26.95Was: $29.95 -
On Sale
HK Gen 1 Spring Upgrade - Roller Retainer Plate
HKP HK Parts
Now: $7.96Was: $9.95HKP 1st Gen Roller Retainer Plate To Spring Upgrade This action 3 roller retainer spring for all 1st Generation bolt heads replaces the oval-shaped roller retainer plate. HK made a wire spring as an upgrade for later production bolt heads to improve the...Now: $7.96Was: $9.95