[Dominick Ferone]

Originally Posted by Chris_Ely

A sabot is a device used in a firearm or cannon to fire a projectile, such as a bullet, that is smaller than the bore diameter, or which must be held in a precise position.

Please remember to consider the safety of whatever mechanism you choose. You will be dealing with a lot of energy with whatever device you use.
In the case of air cannons, do not use PVC pipe to store gases under pressure.

Yea we knew not to use PVC since we were looking into making a T-Shirt launcher.
And with whatever design we do were making a two stage safety where two buttons will constantly have to be pressed otherwise it wont shoot or shoot very slowly.