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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Out Of Stock
HK45 Series, USP, USPC Complete Sear
H&K Heckler & Koch
$43.95Complete Sear Compatible With: HK USP Full-Size 9mm, .40 & 45 HK USP Compact 9mm, .40 & 45 HK45, HK45 Tactical HK45C, HK45C TacticalHKP-01173$43.95 -
On Sale
HK45, P30, USP, USP Compact, P2000 Hammer Spring
H&K Heckler & Koch
Now: $8.95Was: $9.95Hammer Spring This is the stock hammer spring for many P30 models and is used for the heavy TGS and heavy and light LEM conversions on the USP, USPC, P30 & HK45 models. Compatible With: USP Full Size LEM & V4 USP Compact LEM &...HKP-01804Now: $8.95Was: $9.95 -
On Sale
HK G36, SL8 Ejector Spring
USA
Now: $16.95Was: $19.95HK G36 & SL8 Series Of Ejector Spring. Great item to have on hand as this is prone to wear and breakage- US.HKP-18374Now: $16.95Was: $19.95 -
Out Of Stock
HK UMP, USC, G36, SL8 Sear - 9mm, .40 S&W, .45 ACP, 5.56 / .223
HKP HK Parts
$49.95Sear For The HK UMP, USC, G36, & SL8 - USA CNC machined from aircraft grade aluminum that is hard coat anodized that will last much longer than the factory HK part that's made with plastic. This part counts as 1 US-made 922r compliant part. 100% USA...HKP-01847$49.95 -
On Sale
HK UMP Magazine Release Axle
H&K Heckler & Koch
Now: $17.95Was: $19.95Heckler and Koch Magazine Release Axle for HK UMP Replacement magazine release axle for HK UMP platforms. This component is commonly replaced due to wear or breakage and may also be required when configuring compliant magazine release systems where...HKP-02159Now: $17.95Was: $19.95 -
On Sale
HK UMP, USC Lower Locking Pin
H&K Heckler & Koch
Now: $33.95Was: $36.95HK German UMP Lower Locking Pin For use with all HK UMP lowers and USC to UMP conversions. New HK German manufacture.HKP-00595Now: $33.95Was: $36.95 -
On Sale
HK VP9, VP9SK, VP40 Polymer Support Sleeve
H&K Heckler & Koch
Now: $7.95Was: $8.95H&K HK VP9/VP9SK, VP40 Polymer Support Sleeve - Black New HK German VP9 & VP40 support sleeve made of polymer. A great replacement part to have on hand as they are easily marred when you depress the sleeve to access the firing pin or slide plate...HKP-16830Now: $7.95Was: $8.95 -
On Sale
HK45 Series, USP Series Slide Plate
H&K Heckler & Koch
Now: $8.95Was: $9.95H&K HK USP Series/45 Series Slide Plate Compatible With: HK USP 9mm, USP .40 HK USP .45 HK USP Compact 9mm & .40 S&W HK USP Compact .45 ACP All HK Tactical Models HK Elite, Expert HK45C, HK45 HK45C Tactical, HK45 TacticalHKP-01177Now: $8.95Was: $9.95 -
Out Of Stock
HK416, MR556, HK417, MR762 Pistol Grip Screw
H&K Heckler & Koch
$9.95H&K HK MR556/MR762/416/417 Pistol Grip Screw This is the screw used to retail all battle grips/pistol grips on the HK and standard AR15 and M16 firearms. Compatible With: HK MR556 HK416 HK MR762 HK417HKP-02679$9.95 -
On Sale
HK91, G3 Magazine Catch
H&K Heckler & Koch
Now: $17.95Was: $19.95Heckler and Koch Magazine Catch for HK G3 and HK91 High-quality HK German production units are brand-new. These also have the proper newer style cut in them and round shafts. Compatible With: HK91, G3 PTR91HKP-02073Now: $17.95Was: $19.95 -
Out Of Stock
HK G36, SL8 Front Sight Screw - Extended - Dual and Single Optics
USA
$5.95Single Optic Front Sight Screw - G36 - Extended This is a required part if you want to install either the dual or single optic. Compatible With: HK G36 HK SL8HKP-20894$5.95 -
On Sale
HK G36, SL8 Firing Pin - All Variants
H&K Heckler & Koch
Now: $53.95Was: $59.95HK German G36/SL8 Firing Pin This is a great spare to have on hand. The firing pin fits all G36, G36K, G36C & SL8 variants. Compatible With: HK G36/G36K/G36C HK SL8HKP-00289Now: $53.95Was: $59.95