After careful consideration, i finally pulled the trigger and purchased myself an M&P 15-22, MOE version in the flat dark earth. Ordered if offline, so I am waiting on it to come on. Very excited about this purchase. Question: It has the Magpul sights on it and I have a cheap red dot laying around that I would not mind putting on this rifle. I would like to be able to do view the sights with the red dot mounted... (forgot what that term is called)... would i need some kind of riser for my red dot? Also, any ammo recommendations for this firearm that it likes best? I appreciate any help and input !