New M&P 9 Shield started getting stuck in the open position after only a few rounds. Immediately after purchase, cleaned and lubed per instructions and again, after it got stuck the first time.

Something is obviously effed up, because it's impossible to pull the slide back another millimeter, but a sharp rap on the rear of the slide will send it forward. This is obviously not the solution, so today I shall go to the range, and then call Smith & Wesson.

Imagine this happening in a situation where your life depends on it... you'd be DEAD!!