If I tighten those screws all the way, the spring guide stopper doesn't go in the hole for it at the bottom of the gun in front of the trigger guard.Huh? What doesn't fit?
I was considering getting everything before the zero trigger, but it keeps rising in price, and never in stock domestically. Ordering from hon kong and japan is a pain in the ass. So I quickly bought that. Almost everything else is easily found domestically. Besides making $220 is a lot harder than making $50^^That's kinda what took me by surprise. Usually people can't wait to upgrade everything up top and then just try to get away with better sears in the bottom. You already have the most expensive thing; I'd get some new cylinder parts.
I checked the spring it's fine.Make sure that return spring hasn't lost its shape. Sometimes it can get bent out of shape.
Alright thanks. I'll get a new piston ASAP.Chances are you fixed your problem temporarily (and unintentionally) by removing the piston for the picture, and then turning the piston before placing it back into the cylinder.
The end portion of the piston which catches onto the piston sear (I call it the piston catch) was probably worn out. By turning the piston, your sears are now using a fresher piston catch area which has been unused and not worn out.
The random slam-firing is still caused by the piston catch ring not being uniformly round anymore. If it begins to bug you, a new piston should fix the problem given the detail you provided.