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 USP, USP Compact Magazine Spring
H&K Heckler & Koch
Now: $5.95Was: $6.95H&K HK USP & USPC Magazine Spring HK recommends that for optimum performance, one should change out the magazine springs during regular maintenance intervals or when keeping the pistol magazines loaded for long periods. Compatible With: HK USP...HKP-01425Now: $5.95Was: $6.95 -
On Sale
HK90 Series Roller for Bolt Head 8.00mm - Standard
H&K Heckler & Koch
Now: $25.95Was: $27.95H&K Roller For Bolt Head 8.00mm - Standard The 8mm roller is the proper roller size for the standard "zero" function. The correct 8mm roller is essential for proper head spacing and bolt gap. New HK German, not surplus or used goods, that are worn...HKP-00506Now: $25.95Was: $27.95 -
Out Of Stock
HK91, G3 Rear Push Pin Reinforcement Weldment
PTR
$29.95HK91, G3, PTR, CETME Push Pin Reinforcement Weldment HK91/G3/PTR91 or CETME steel receiver flat weldment that is added to the rear of the receiver where the 2 large stock push pins install to reinforce this section of the receiver against damage or use...HKP-18224$29.95 -
On Sale
HK VP9 Series Trigger Pull Spring Set
Lazy Wolf
Now: $16.95Was: $19.95Lazy Wolf Guns Duty/Defensive Carry Enhanced Trigger Pull Spring Kit Based on the Lazy Wolf Guns Design. We now have an intermediate drop in set of springs for the utmost in performance and reliability in ALL VP9 family pistols. Defensive carry,...HKP-19515Now: $16.95Was: $19.95 -
On Sale
HK MP5, HK90 Series Pinned Hammer - Full Auto
H&K Heckler & Koch
Now: $26.95Was: $29.95Hammer, Full Auto HK 90 Series Trigger Packs - German HK - Used German HK Hammer- used, surplus in VG-EXC shape and in perfect working order. With the proper hole on the hammer to pin the strut in place. This hammer is the hammer that is most commonly...HKP-18305Now: $26.95Was: $29.95 -
HK Rear Sight Oval Washer
HKP HK Parts
$2.95HKP Rear Sight Oval Washer HK German oval washer for the rear sight diopter style assemblies. This is the needed washer used in conjunction with the locking washer. Fits and works with all diopter-style rear sights.HKP-00870$2.95 -
HK MP5, MP5K Firing Pin Spring
H&K Heckler & Koch
$32.95H&K MP5 & MP5K Firing Pin Spring The latest firing pin spring features a stronger and more durable braided design, surpassing the standard non-braided spring in performance and longevity. Compatible With: HKMP5 HK MP5K HK SP5 HK SP5K ...HKP-00063$32.95 -
On Sale
HK UMP, USC Stock Axle Pin
Other
Now: $12.95Was: $14.95Heckler and Koch Stock Rear Stock Axle Pin for your HK UMP or USC This is the stock pin that allows you to attach the stock to either the factory receiver of a UMP or for those who are doing the USC to UMP conversion. This pin is required to attach the...HKP-02591Now: $12.95Was: $14.95 -
HK MP5, HK90 Series Ejector Axle Spring Ring - SEF, Ambi
USA
$1.95Ejector Lever Axle Retaining Spring This is the perfect spring ring to replace your worn out ejector lever axle spring ring. Made to HK spec for the best US replacement part on the market. Replacement of the retaining spring clip is necessary to keep...HKP-20629$1.95 -
On Sale
HK MP5, HK90 Series Magazine Catch Spring
H&K Heckler & Koch
Now: $4.45Was: $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...HKP-01917Now: $4.45Was: $4.95 -
On Sale
HK MP5, HK94, MP5K, SP89 Firing Pin - Steel
HKP HK Parts
Now: $14.95Was: $17.47MP5, MP5K, 94, & SP89 Firing Pin - Steel Each part is made using the factory HK material and specifications from original HK German blueprints. Compatible With: MP5, HK94 MP5K, SP89, SP5K MP5 40, 10mm, .357 Sig Zenith, POF, Omega, DT,...HKP-02115Now: $14.95Was: $17.47 -
On Sale
HK MP5, MP5K Extractor - 9mm - US
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...HKP-20959Now: $26.95Was: $29.95