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
HK416, MR556, G36, SL8 Piston Ring - Replacement Set of 3 - USA
HKP HK Parts
Now: $7.95Was: $8.95HK MR556, HK416 & G36, SL8 Gas Piston Ring Replacement Combo Set - 3 Rings This is a high wear common repair & replacement item. The gas rings are prone to periodic breakage & wear, tear and require them to be replaced periodically...HKP-17933Now: $7.95Was: $8.95 -
On Sale
HK VP9, VP9SK Right Side Charging Support
H&K Heckler & Koch
Now: $5.95Was: $6.95H&K HKVP9/VP9SK Right Side Charging SupportHKP-16826Now: $5.95Was: $6.95 -
On Sale
HK45, HK45C, USP Detent Plate V3, V4
H&K Heckler & Koch
Now: $26.95Was: $29.99Detent Plate For V3 & V4 Installing the V3/4 detent plate will configure the selector lever to de-cock only, thereby disabling the safety function. The V3/4 is a popular configuration to LE/MIL agencies around the globe as well as many concealed...HKP-01172Now: $26.95Was: $29.99 -
Out Of Stock
HK416, MR556, G36 Gas Piston - Complete
H&K Heckler & Koch
$50.95H&K HK MR556/MR762/416/417/G36/SL8 Complete Gas Piston New HK German gas piston assembly with three locking piston rings installed. This is a great spare part to have on hand, as the gas piston takes a lot of wear and tear. Compatible With: HK...HKP-00047$50.95 -
On Sale
HK MP5K, HK90 Series Sear Complete - Steel - Used Surplus
H&K Heckler & Koch
Now: $11.95Was: $12.95Heckler & Koch's Sear Catch Release - Complete for HKP 90, MP5K Trigger Packs - German - Used - Steel German HK Sear/Catch complete with installed detent, spring and roll pin. Used surplus in VG-EXC shape and in perfect working order and complete...HKP-18304Now: $11.95Was: $12.95 -
On Sale
HK45, USP Firing Pin Spring
H&K Heckler & Koch
Now: $6.95Was: $7.95H&K HK USP/45 Firing Pin Spring Compatible With: HK USP 9mm HK USP 40 HK USP 45 HK USP Tactical models HK USP Expert, HK Elite HK45, HK45 TacticalHKP-01080Now: $6.95Was: $7.95 -
On Sale
HK416, MR556, G36, SL8 Piston Ring - Replacement Set of 3
H&K Heckler & Koch
Now: $17.95Was: $19.95HKP Gas Piston Ring Replacement Combo Set- 3 Rings The gas rings are prone to periodic breakage and wear and tear and require them to be replaced periodically. These are some of the most common breakage parts we see that need to be replaced on these...HKP-00048Now: $17.95Was: $19.95 -
On Sale
HK MP5 Replacement Buffer For Folding Stock Or End Cap
Choate
Now: $2.95Was: $3.95Choate MP5 Replacement Buffer For Folding Stock Or End Cap Compatible With: Choate MP5 and MP5K Stocks or End Caps (NOT compatible with MP5 .22 LR)HKP-00116Now: $2.95Was: $3.95 -
On Sale
HKP Roller +1 - New - 8.01mm
H&K Heckler & Koch
Now: $8.95Was: $8.99Roller +1 - New - 8.01mm HK Parts Standard (8.01 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...HKP-19424Now: $8.95Was: $8.99 -
On Sale
HK91, G3 Cocking Handle Support
H&K Heckler & Koch
Now: $22.95Was: $24.95New HK German 91, G3, & PTR Cocking Handle Support A genuine German Heckler & Koch all-steel part. Compatible With: HK91 HK G3 PTR-91 PTR-32 HK .308 Custom builds & clonesHKP-01442Now: $22.95Was: $24.95 -
On Sale
HK VP9, VP40 Magazine Release - Enhanced
HKP HK Parts
$42.95 - $49.95Enhanced Magazine Release - Alloy - HK VP Series The oversized magazine release increases the overall surface area and makes it possible to release the magazine without changing the position of your grip. Made in the USA from 6061 billeted aluminum...HKP-21099-M$42.95 - $49.95 -
On Sale
HK P Series LEM Elbow Spring
H&K Heckler & Koch
Now: $5.95Was: $6.95HK P Series LEM Elbow Spring Compatible With All LEM Models Below: HK P30 HK P30L HK P30SK HK P2000 HK P2000SKHKP-02498Now: $5.95Was: $6.95