Experienced handgunner but new to Glock. Started out my Glock experience with a brand new Gen 4 Glock 40 (10mm, MOS, 6" longslide). Can't beat the smackdown of full house 10mm loads AND 15+1 capacity, right? Intent is to make this a deer hunter with the addition of a good optic, and for it to to ride along most anytime as a means of discouraging black bears, which we rub elbows with regularly in this neck of the woods. Love steel and wood, but hey - those old revolvers are becoming seriously valuable...why subject them to daily wear and tear? I'm one of those guys - I like to see how things work as well as maintain them with a vengeance.(NOT really a rookie, I do this with S&W's, Sigs, Kimber's, CZ's, Ruger's, etc) I got this G40 apart, and it seriously did NOT want to go back together! Align the slide with the rails, push together, and WHAM...the slide would come to a hard stop, barely 1/8" from clicking home - mister, that thing might as well have come up against a brick wall....frustration,sweat, and embarrassment...I thought these things were simple and efficient!? I could not find the issue - what was stopping the slide? I somehow stumbled upon the solution - that the trigger had to be pulled back forward, then things glided together easily. What gives - can someone explain the issue? Is this typical of any/all Glock's?