UMP / USC Small Parts
Explore our selection of HK UMP and HK USC small parts, perfect for repairs, upgrades, and custom builds. Our inventory includes precision-machined replacement components, push pins, springs, and maintenance parts designed for proper fit, durability, and reliable performance.
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HK G36, SL8, UMP, USC Handguard Sling Loop - Ambidextrous
H&K Heckler & Koch
$40.95UMP, USC, SL8, & G36 Ambidextrous Sling Loop Or Eyebolt For Sling - German HK The addition of the HK eyelet creates a sling attachment point that will enable you to mount a sling using any of the hard mounting points located on the forearm of the...HKP-00611$40.95 -
HK UMP Extractor - 9mm
H&K Heckler & Koch
$60.95New HK German USC/UMP 9mm Extractor This is the perfect spare part to have for your UMP or USC 9mm conversion. Hard to find and only available here at HKPARTS.HKP-00266$60.95 -
HK UMP, USC Stock Block B Thumb Screw
HDPS
$74.95HDPS HK UMP/USC (.40 S&W/.45 ACP/9mm) Stock Block B Sling Pin-Thumb Screw Style The original thumb screw version for all stock block B's.HKP-15731$74.95 -
HK UMP, USC Cocking Lever Support Tube
H&K Heckler & Koch
$19.95HK UMP & USC Cocking Lever Support TubeHKP-01883$19.95 -
HK USC, UMP Extractor - .40 S&W
H&K Heckler & Koch
$54.95HK German UMP Or USC .40 Extractor New HK German factory OEM part. This is a high wear and replacement item as the .40 cal cartridge has a high impulse that results in an increased occurrence of this extractor wearing out and breakage. A must-have...HKP-00264$54.95 -
HK UMP, USC Bolt Catch Pin
H&K Heckler & Koch
$5.95H&K UMP/USC (.40 S&W/.45 ACP/9mm) Bolt Catch PinHKP-16517$5.95 -
HK UMP Release Lever
H&K Heckler & Koch
$9.95HK UMP Catch Release Lever Or Trip Lever For All UMP LowersHKP-01890$9.95 -
HK G36, SL8, USC, UMP Sight Screw - Rear
H&K Heckler & Koch
$19.95HK G36, SL8 & USC, UMP Rear Sight Screw Rear sight screw to retain HK G38/Sl8 & USC/UMP rear sights housings to the rear sight base. Compatible With: G36, SL8 USC, UMPHKP-16382$19.95 -
HK UMP Magazine Floorplate
HKP HK Parts
$7.95HKP HK UMP Floorplate Compatible With: UMP .45 UMP .40 UMP 9mm These can become cracked or broken with use or drops onto hard surfaces. Made in the USA and counts as 1 US compliant part.HKP-17161$7.95 -
HK UMP Magazine Release - Enhanced - Billeted
HKP HK Parts
$34.95HKP HK Parts Enhanced Paddle Magazine Release for HK UMP 9mm, .40 S&W, .45 ACP This is a very common replacement part as they are fairly easy to break on the UMP lower. With this new mag release, you'll get a wider release as well as a much more...HKP-18758$34.95 -
HK UMP, USC Sling Pin, Stock Block B - QD
HKP HK Parts
$74.95Quick Detach Sling Pin for Stock Block B - USC, UMP This Ambidextrous QD Sling Pin allows you to replace your Push Pin Style or Eyelet Sling Loop - Style Pin in your Stock Block B for use of a QD Sling.HKP-18776$74.95 -
HK UMP Firing Pin Retainer Pin
H&K Heckler & Koch
$7.95HK UMP Firing Pin - Retainter Pin This is the pin that trips the trip lever on the UMP lower. Compatible With: HK UMPHKP-01894$7.95