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
HK MP5, HK33, HK53, HK93, HK91, G3 Locking Roller for Bolt Head - 8.04mm
H&K Heckler & Koch
$29.95H&K +4 Roller For Bolt Head 8.04mm - Over-Sized New HK German not surplus or used goods. The correct roller is essential for proper head spacing and the bolt gap. Compatible With: HKG3, 91 & PTR HK93, 33, 53 HK MP5, MP5K Cetme, C308 Clones...$29.95 -
HK UMP, USC Picatinny Rail Screw
$0.75HK UMP/USC (.40 S&W/.45 ACP/9mm) Picatinny Rail Screw Good spares to have on hand as screws can get damaged or lost.$0.75 -
HK MP5, MP5K Magazine Follower and Locking Plate Set - 9mm
HKP HK Parts
$12.95HKP MP5 & MP5K 9mm Magazine Follower & Locking Plate Set A drop in item that allows you to swap your follower & locking plate to green or red. Best for a quick empty mag identifier. A great training or range aid at a great price. Made...$12.95 -
HKP UMP/USC (.40 S&W/.45 ACP/9mm) Recoil Buffer
$11.95HKP USC & UMP Recoil Buffer Replaceable spare lower housing or buffer for buffer housings. This is a high wear & replacement item and a must have for spare parts. Compatible With: HK USC .45 HK UMP models$11.95 -
HK45C, P30, USP Compact Firing Pin Spring
H&K Heckler & Koch
$8.95HK P30/USPC/45C/P2000 Firing Pin Spring A must have spare replacement part to keep on hand and to swap out during pistol servicing. Compatible With: HK USP Compact 9mm HK USP Compact 40 & .357 HK USP Compact 45 HK P2000 Series HK P2000SK Series HK...$8.95 -
HK MP5 A3 Buffer - Stock - Retractable
H&K Heckler & Koch
$27.95H&K HK MP5 A3 Buffer - Stock - Retractable Stock Buffer These common wear items need to be replaced when they become yellow, brittle, and worn. Inspect your buffer for the following: discoloration, the buffer becomes hard and brittle, tears, cracks,...$27.95 -
HK33, HK53, HK93 Rear Sights Windage Screw
H&K Heckler & Koch
$4.95H&K Rear Sights Windage Screw - HK 90 Series This is a hard-to-find rear sight screw new from HK Germany - not surplus.$4.95 -
HK90 Series Hammer Axle For Trigger Pack
H&K Heckler & Koch
$2.77H&K 90 Series Hammer Axle For Trigger Pack HK German used hammer axle for the 90 series style of trigger packs. Each axle pin or pivot pin measures .237 inches (6.0mm). A great spare and must have spare part for anyone that owns an HK 90 series of...$2.77 -
Out Of Stock
HK VP9, VP9SK Left Side Charging Support
H&K Heckler & Koch
$5.95Charging Support, Cocking Aid - Left Side - VP9 & VP9SK Replacement cocking aid for the slide. German HK. Compatible With: VP9 VP9 Tactical VP9SK$5.95 -
HK Locking Washer - Rear Sights
HKP HK Parts
$2.95HKP Rear Sights Locking Washer HK German rear sights toothed locking washer used in perfect working order.$2.95 -
HK G36, SL8 Push Pin for Handguards, Lowers, Magwells
H&K Heckler & Koch
$18.95HKP HK G36, SL8 Forearm, Lower, Magwell U.S Push Pin U.S. made G36 push pin finished in black oxide. This push pin is also required for converting the SL8 to a G36. G36's use three of these factory push pins per rifle whereas the SL8 has two.$18.95 -
HK USP Optic Plate - Burris FastFire - Red Dot Pistol Mount
HKP HK Parts
$49.95HKP HK USP Red Dot Pistol Mount Red Dot mounting plate to allow the use of a Burris Fast Fire, Docter, Vortex Venom or other similar specs Red Dot Sights. Compatible With: HK Full Size - USP 9mm HK Full Size - USP .40 HK Full Size - USP .45 (Not...$49.95