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 MP5, MP5K Extractor - 9mm
H&K Heckler & Koch
$65.95New HK German HK 9mm Extractor - Latest Generation This is the latest and greatest HK MP5 (newest F style version) German extractor. Each unit works with all HK MP5, HK94, HK MP5K, HK SP89, HK SP5K, or other 9mm clones. A great part to have as a spare or...$65.95 -
HK Rifle Extractor Spring - FMP
H&K Heckler & Koch
$3.49HK Parts contracted with FMP to bring you this Rifle Extractor Spring Features: New FMP contract The extractor spring is the number one replaced item on HK firearms. Many HK gunsmiths recommend upgrading HK94, HK MP5 series HK's with a longer stronger...$3.49 -
HK45, USP Spring - Flat Sear - Match - Enhanced
H&K Heckler & Koch
$9.95Enhanced Match Flat Sear Spring The nickel-plated sear spring is also regarded as a "match" flat spring as it will improve the feel and "smoothness" when pulling the trigger as it takes up some of the gritty feel. It is a must-have upgraded part to...$9.95 -
HK90 Series Push Pin - Buttstock
H&K Heckler & Koch
$3.95H&K 90 Series Butt Stock Push Pin Each large stock push pin is used to retain the stock to the receiver on the 90 series of firearms. Large push pins are for the stock and the small push pin is for the forearm and lower. The HK German genuine push...$3.95 -
Out Of Stock
HK VP9, P30 15 Round to 17 Round Magazine Conversion Kit
H&K Heckler & Koch
$34.95HK Magazine Conversion Kit - VP9/P30 - 15 round to 17 round Factory OEM German HK Magazine Upgrade Conversion Kit that allows the end user to convert an existing VP9/P30 15 round magazine body/magazine to 17 round capacity. Each kit will allow the...$34.95 -
HK MP5 Replacement Buffer - Folding Stock or End Cap
HKP HK Parts
$3.49HKP MP5 Replacement Buffer for Folding Stock or End Cap Spare replacement buffer for choate folding stocks or end caps. Compatible With: Choate MP5 and MP5K Stocks or End Caps (NOT compatible with MP5 .22 LR)$3.49 -
HK 90 Series Axle - Ejector Lever - US
HKP HK Parts
$9.95US Ejector Lever Axle This US ejector lever axle pin holds the ejector lever in place in the trigger pack. Made out to HK spec for the best US replacement part on the market. The best replacement for your worn out or broken axle. A must have replacement...$9.95 -
HK Roller Retainer Pin - New Style
H&K Heckler & Koch
$6.95HK Roller Retainer Pin, Clamping Sleeve- New Style This part works with all roller retainer plates and springs. HK started this change of roller retainer pins starting in all 2011-produced bolt heads. Works with all styles of roller retainer plates...$6.95 -
HK VP9, VP9SK, VP40 Spring Set - Ultra Match
HKP HK Parts
$19.95HKP HK VP9/VP9SK, HK VP40 Ultra Match Spring Set Ultra Match drop-in spring kit will give your VP9, VP40 an even smoother, crisper, and lighter pull that helps promote consistent match-grade accuracy, and control, by dropping the trigger pull of your...$19.95 -
HK Push Pin - Butt Stock - German
H&K Heckler & Koch
$8.95HK German Butt Stock Push Pin Each large stock push pin is used to retain the stock to the receiver on the 90 series of firearms. These are great replacement or spare parts to keep on hand as they fit all of the 90-series firearms below. The large push...$8.95 -
HK416, MR556 Retaining Spring - FFRS
HKP HK Parts
$4.99HKP HK MR556/HK416 FFRS Retaining Spring The retainer spring retains the handguard locking pin on the free floating rail system (FFRS). These can become damaged with the removal of the handguard screws. Once the spring is damaged, they require...$4.99 -
HK USP, P30, P2000 Hammer Spring - Light
HKP HK Parts
$8.95HKP HK USP/P30/P2000 Light Hammer Spring Finally a New US Production 10 lb. Hammer Spring For HK USP, P30 & P2000. Brought about by many customers asking for a 2 lb. lighter hammer spring than stock (12 lb.). This is also a popular hammer spring used...$8.95