Last night I was cleaning my 5" .38 M&P and noticed the cylinder latch screw was loose. Insted of just tightening it up and moving on, I took it off to oil the bearing surfaces. Now it won't go back on and it wont slide forward or back. I am lost. What happened, and how do I fix it?? Thanks in advance.

De Oppresso Liber

Fixed it! Had to remove the side plate, main spring and hammer.

These oldies but goodies do sometimes get gunked up and sticky, don't they!