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...
Front Sight - HK USC, UMP - USA
Easy to swap out. Knock out the roll pin, remove, replace, and then re-insert the roll pin. Common wear or breakage part.
Compatible With:
All models of USC