Guns using compressed gas release a metered volume of gas into a chamber where it expands driving the projectile down the barrel. I don't think there's any doubt that things like paintball guns, airsoft, t-shirt cannons and the like meet that definition.GeekwithaGun wrote:I am not a scientist nor expert in what constitutes "expanding gases", however I believe the highlighted "guns" use "compressed" gases and would not be in the same class.
of course I could be completely wrong - so don't quote me
I won't speculate as to the intent.