by Fluffy Boy 32 » Wed Apr 27, 2011 11:36 pm
This is for a UTG MK96/WELL Warrior trigger box but he essentially explains how all trigger boxes work.
Skip ahead and from 3:15-4:03 he tells you how the trigger box works.
As he explains the piston sear catches the piston, from that example it is probably something wrong with that which is causing it to slam fire. Something could just be loose or you may need a new sear set.
If your comfortable taking the gun apart, you could easily identify the problem yourself...
Armory:
-PolarStar'd VFC 635 w/ R-Hop
-KWA USP Compact
-Custom Zombie Killer KJW 1911