I have a question for you guys out there who have a M&P pro. I was thinking of getting the 5" model in 9mm for IDPA. I know on my Steyr, when it is in slide lock, and I put a new mag. in, the slide automatically drops. I do not have to slingshot it. Do you have to slingshot the slide to close it when putting in a new mag, with the M&P pro?