Yep the Shield will fire without the magazine (doesn't have a clip). Many of the standard M&P models don't have a magazine disconnect, not a feature they put on them all. I personally wouldn't own one if it did have a magazine disconnect, not a feature I'd ever want.
l've heard police work is dangerous. Yes, that's why l carry a big gun. Couldn't it go off accidentally? l used to have that problem. What did you do about it?
l just think about baseball. -Leslie Nielsen