I just bought a Smith & Wesson AR 15 a href="http://www.smith-wessonmp.com/item/168878_Smith__Wesson_Rifles_Shotguns_S?" rel="nofollow"http://www.smith-wessonmp.com/…/a

I want to add battle sights to this. Do I need to buy any mounts or anything to put these on? They will be Magpul or Troy IND folding backup sights. Any help is appreciated.