Originally Posted by CRSHDMY
if you normaly use a 68/45 on your normal gun, use it on your pump... if your a shorter player, maybe use a 45/45... but make sure the tank fits you corectly. it will improve shot accurasy and posture wich are both extreamly important in pump. the general rule of thumb is to extend your arm out in front of you with your marker in the hand palms up. and if the tank reaches within 2 inches on the center point of your inner elbow, your golden.
Good advice, but depending on the pump you can change that. For example, on my Trracer I use a 13ci Ninja. Just pumping it, without a foregrip, that's way too short. However, when I put my foregrip on and adjust it properly, it fits perfect. So it depends on what gun you have.