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 UMP, USC Stock Axle Pin
Other
$14.95Heckler and Koch Stock Rear Stock Axle Pin for your HK UMP or USC This is the stock pin that allows you to attach the stock to either the factory receiver of a UMP or for those who are doing the USC to UMP conversion. This pin is required to attach the...HKP-02591$14.95 -
HK UMP, USC Barrel Roll Pin
H&K Heckler & Koch
$11.94Heckler and Koch German made USC and UMP Universal Barrel Roll Pin HK recommends replacing the barrel pin when the barrel is removed with a new barrel pin. This is a great spare part to have on hand. The factory-correct barrel pin for all HK UMP and USC...HKP-00603$11.94 -
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.HKP-16562$0.75 -
HK UMP, USC Recoil Buffer
HKP HK Parts
$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 modelsHKP-18746$11.95 -
HK UMP Lower Locking Pin
HKP HK Parts
$12.95HK UMP Lower Locking Pin, Push Pin For use with all HK UMP lowers & USC to UMP conversions. Made in the USA. This is the pin that holds the lower to the receiver. Compatible With: UMP USC Conversions TBT builds Omega Other builds that...HKP-18580$12.95 -
Sling Snap Hook 1" - Universal
USA
$4.95Snap Hook 1" This is a 1" HK-style snap hook for sling or other custom projects. We also offer 1.25" HK sling hooks, as these are great spare parts to have on hand.HKP-00730$4.95 -
HK UMP Paddle Magazine Release
H&K Heckler & Koch
$16.95UMP Paddle Magazine Release This is a common repair and replacement part as they are easy to break on the UMP lower. Simple and easy to install with no gunsmith needed or required. Compatible With: UMP .45 UMP .40 UMP 9mm Please Note: This...HKP-00810$16.95 -
HK UMP, USC Lower Axle
H&K Heckler & Koch
$9.95HK UMP & USC Lower Axle - German 3 X lower axle pins are used for each trigger group or lower all pins are the same size, except the mag release axle on the USC model.HKP-01893$9.95 -
HK UMP, USC Cocking Handle Pin
H&K Heckler & Koch
$7.95HK UMP & USC Cocking Handle Pin Compatible With: HK UMP HK USCHKP-01885$7.95 -
HK G36, UMP Sear Spring
H&K Heckler & Koch
$8.95HK UMP, USC, G36, & SL8 Sear Spring This part is used in conjunction with the sear in the trigger body of the lower.HKP-01866$8.95 -
HK UMP, USC Firing Pin Spring
H&K Heckler & Koch
$9.95H&K UMP/USC (.40 S&W/.45 ACP/9mm) Firing Pin Spring This is a common wear and breakage item. This item also frequently becomes lost by end users when field stripping the UMP and USC Bolts. Compatible with: All HK UMP & USC FirearmsHKP-00262$9.95 -
HK G36, UMP Folding Stock Release Spring
H&K Heckler & Koch
$9.95HK G36 Folding Stock Release Spring This is the spring that fits under the stock release button to activate the folding and retention of the G36 or UMP stock. Compatible With: HK G36 HK G36K HK G36C UMPHKP-00637$9.95