Originally Posted by Rookie Ab
The way I read that is 150 meters per second approx 500 fps
quote;2. DO NOT use this mask for protection if munitions, different from bbs cal. 6 mm weight 0.12 - 0.28 g and velocity above 150 m/s, are used.
look in the bat mask submission http://brassguardequip.com/bat-mask.html
it says fps.
also look at quote 6
6. DO NOT shoot at the mask from AEGs above 150 fps.
in the same page as the quote you got