i workout about 6 times a week. i am 5'11 and weigh around 170 pounds. From my height/weight you can see that im not the largest person in the gym. I train hard every workout and everything seems to grow at a decent rate: chest, back, and legs. The one set back i have, and the muscle i want to gain the size most on, is my arms: triceps, biceps, and shoulders. It seems like no matter what i do, i just cant gain size. I tried super-sets of triceps/bicep for 2 months, i tried drop sets, i lift heavy and still they just seem to get cut and vascular, no mass. My diet is top notch. I get in about 3500 calories, 200 grams of protein, and 350 carbs. I workout arms twice a week on Tuesdays and Fridays. if anyone can help it would be very much appreciated. Thanks