Okay, this will sound incredibly stupid.
Being a dumb idiot, I thought it would be nice to see a G17 gen 4 slide on a G17 gen 3 lower. I don't know why, they are even identical.
Now the slide is jammed in place, and can slide about 3-5 mm side to side. But otherwise it won't budge
Help would be appreciated!
(Both are WE)