I took my newly purchased S&W 15-22 to the range today for the first time. Pulled the trigger once, one round fired. Pulled the trigger for the second time, one round fired. Pulled the trigger for the 3rd time and the magazine emptied in what seemed like a second. Figured it was a fluke and put 10 more rounds in the mag to try it again, pulled the trigger and all 10 rounds fired. This is actually my first rifle, let alone my first AR platform so I have no idea what to do and I’m looking for advice. What’s my next step?