Originally Posted by
maximus
I have messed with one of these triggers. The fault turned out to be the leg of one of the springs not being hooked in the correct place and it would some times jam the trigger mech preventing firing. If you look from the butt end of the gun with the trigger pointing up the spring leg went down the l/h side inside the block housing the trigger components. There was a slight lug sticking out which should of had the spring leg latched on it. Might be the same on yours.
atb
Max