HDPS HK UMP/USC (.40 S&W/.45 ACP/9mm) Stock Block B - Push Pin
This sling pin will replace the current production stock Block B hardware and upgrade to the Sling Pin Pull Style version.
Quick 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...
HKP HK UMP .45 ACP Magazine Block
UMP mag block plug to limit the magazine capacity to 10 rounds for states with capacity restrictions. This is designed to use on the HK UMP .45 25 round magazine...
HKP HK UMP & USC - Curved Trigger
With our new curved trigger, you will improve the aesthetics of your firearm. Our curved trigger has spaced-out serrations at the face of the trigger for a far...
New Latest Production HDPS HK USC/UMP Stock Block -B Pin Style
For use with all HK UMP factory or US-made folding stocks. Each unit comes with a new push-pin design. This is a required part of the HK...