I bought a new Shield custom shop 9mm yesterday. Today I took it out to fire a few rounds. The first round fired hit the target a coke bottle at 10 yards. However I had a major problem. The spent shell ejected but the slide locked back and I mean locked it is immovable. The slide release does nothing. I am an experienced shooter do not limp wrist I am left handed so do not ride the slide stop. I plan on calling S&W in the morning but any ideas?