My S&W M&P15 does not have the picatinny/tactical rail on it and I have been looking for one to add to it. I'm not really wanting to add a whole new forearm to it, plus I couldn't afford one right now anyway. I've looked at several different ones, but was wondering if there is a certain brand to stay away from or a certain brand to go ahead and buy. I don't know if this helps but, I'm wanting to add a forward grip and possibly a flashlight or a lasersight to it.