I weigh about 155 lbs right now and I'm about 5'9 tall. I know that is probably a good height and weight for fighting but I would like to put on some more muscle mass and bulk up to about 170. Right now I train 4 classes of mma per week (2 standup and 2 ground). I can goto a fairly good gym for free too so that's not a problem. If I just started upping my calories a lot but keeping the food healthy, would I start to pack on some bulk? I know it's a lot harder with all the cardio that mma provides but I'm willing to try. Right now, I don't each much at all and remain around 155 lbs but I figure that I could pretty easily double my calorie intake if I wanted to. One more thing, should I buy a weight gaining protein powder or a low carb one? I do want to gain weight but I'm trying not to get fat in the process. I know some weight gained will be fat but I want to minimize that if possible.