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 90 Series Pinned Hammer
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...Now: $26.95Was: $29.95 -
On Sale
HK USP/USPC/45 Match Hammer Spring
H&K Heckler & Koch
Now: $5.36Was: $5.95HK USP, USPC, & HK45 Match Hammer Spring The match hammer spring is also known as the USPC standard hammer spring. This is also the correct spring needed for the light, TGS, and LEM conversion for the USPC & other custom pistol configurations...Now: $5.36Was: $5.95 -
Out Of StockOn Sale
HK Roller +8 - New - 8.08mm
HKP HK Parts
Now: $7.19Was: $8.99Roller +8 - New - 8.08mm HK Parts Standard (8.08 mm) locking roller, The proper roller size is essential for proper bolt gap. US Manufacture. Please Note: The price listed is per roller. Order 2 (pair) for a complete set for the bolt head. An easy way to...Now: $7.19Was: $8.99 -
On Sale
HK Rear Sight Oval Washer
HKP HK Parts
Now: $2.36Was: $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.Now: $2.36Was: $2.95 -
On Sale
HK MP5, MP5K Spring - Firing Pin
H&K Heckler & Koch
Now: $29.66Was: $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 ...Now: $29.66Was: $32.95 -
Out Of StockOn Sale
HK MP5, HK94, MP5K, SP89 Firing Pin - Steel
HKP HK Parts
Now: $13.98Was: $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,...Now: $13.98Was: $17.47 -
On Sale
HK91, G3 Rear Push Pin Reinforcement Weldment
PTR
Now: $17.95Was: $19.95HK91, 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...Now: $17.95Was: $19.95 -
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