Picked up a pretty nice looking S&W K-22 Target Masterpiece some time back and the cylinder would hang up more times than not in both SA and DA mode. Removed the side plate and didn't see anything broken. Took it completely apart, put it back together and now the cylinder won't rotate at all.

There's a good chance I reinstalled something wrong but could that same thing have been partially wrong before I messed with it? TIA