"This might be too powerful to use with your friends at .20, i would recommend getting .25 just to be safe. Plus they are a little more accurate, considering they have more weight. Very sturdy pistol, nothing shakes around in the inside of the gun, nice blow back, and super accurate. Adjusting the hop up will give the bb a little bit more spin out of the barrel to increase accuracy. Very useful add on when in close quarter areas."