1900 will not cycle

[gunbugs]

Originally Posted by DavidJayUden

Check to see, when the trigger is pulled, if the side plate flexes out away from the gun under trigger tension.
dju

Had that happen with a customers P-08, which had been heavily buffed and reblued. They had buffed the tongue on the sideplate so much, that when you would pull the trigger, the sideplate would push away from the frame, causing it to fire "occasionally". A tiny pinprick tig weld on the tongue edge, some minor fitting, and it worked reliably after that.