Subject: Is a 1/4 in thick pipe strong enough not to buckle

For a math project we were looking at making a projectile launcher that 
measured 6' long with an inside barrel diameter equal to a tennis ball and 
a thickness of 1".  However the machinists in town can not obtain aluminum 
that thick, instead they can only get 1/4".  Would this be strong enough to 
not buckle under atleast 1000 psi?

Re: Is a 1/4 in thick pipe strong enough not to buckle