Yesterday, I received an M&P15A...as a gift. I've been wanting one ever since I got the M&P40 about a year ago. The local gun store had one and I made the mistake of picking it up and holding it. The M&P has to be the most comfortable AR style rifle I've ever held. Can't wait to start putting stuff on it. One question...the one I have is chambered for 5.56mm. Can you shoot .223's in it, or do I need to stay with the metric stuff? I absolutely love this gun and I'll try to get some pics of her up pretty soon.