Well the mask stopped 30+ shots from a KJW MK1 shooting 415 fps at different angles, distance(from barrel touching screen to 3 feet away and inbetween), and locations on the mask's screen and face plate(most shots were on the screen) Results, stopped them all but, left those white marks and a tiny dent from 3 shots in same location point blank!
Now go and do the same to yours!