After putting a few hundred more rounds through my GEN4 G21- I cleaned & oiled it. A few days later I noticed a little oil on the side if the trigger - I did not try to oil the trigger - figure a drop must have gotten down there by accident. Being OCD I take the slide off and try to wipe the excess oil from this area - I ended up pushing the trigger slightly forward while the slide was off - it would not go back to the rear. I put the slide back on - it was not as easy to do as normal - and the trigger goes forward like is should - first trigger pull felt a little strange - but the gun now seems fine - I don't think I messed anything up. MY QUESTIONS: What would happen if I push the trigger all the way forward while the slide was off? Will it mess up something? How should I get the trigger to return back (like gun was fired) with the slide off. Never noticed this - trigger staying back after taking slide off with other guns - is this something unique to Glock? Anything I should be concerned with about my trigger - like something I should check for damage?