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.
Michaels Machines USC to UMP Stock Block B w/Thumbscrew
For use with all HK UMP factory or US made folding stocks. Each unit comes with a thumbscrew on one end and a slotted section on the...
HDPS HK UMP/USC (.40 S&W/.45 ACP/9mm) Stock Block B- Eyelet Screws
New latest production HDPS HK USC/UMP Stock Block type for use with all HK UMP factory or US made Folding Stocks. Each unit...
HK German UMP Rear Stock Axle Pin
This is the HK factory German stock pin that allows you to attach the stock to either the factory receiver of a UMP or for those that are doing the USC to UMP...