I just purchased my first S&W last week and today joined the S&W Forum. I immediately gave my new carry piece a good cleaning before heading to the range. I noticed that after the final shot from the extended mag, and the slide still retracted, the magazine will not drop reliably. It will disengage, moving approx. 1/8 in., and stop. If the action is closed, the ext. magazine will drop perfectly. I returned home, gave the ext. mag and mag well a wipe down and light lubrication, but it still does not function properly. I can reproduced this at home simply by locking back the slide. About 75% of the time the ext. mag will not drop. The flush magazine works perfectly.
Has anyone else had this issue? Is there a reliable fix or will I need to call S&W?