I have an M&P15 Sport, took it to the range for the first time this Sunday, shot flawlessly through 160 rounds and I had a blast, didn't take much adjusting to sight it in with the stock irons/mbuis.

Anyway, I also have an extra Vortex Crossfire II 1-4x24 that I think I would enjoy on the M&P15 Sport. It's a 30mm tube.

It's my first AR, and I'm not informed with all the options. What kind of mount do I need? I see one piece ones that place the scope farther forward, is that necessary? Does the quick disconnect stuff come in handy or do most people never really remove the optics anyway? What would I look for if I just wanted to run scope rings? Medium height, tall, extra tell, any specifics to know?