[qazedx]

thank yuo for attention, but to make a woden track, that sound very unreliable, I was planing to put an aliuminium rail but when I buoght it I thought it will be to soft,so I decided to put a stainlles steal barel and to make an enclosed track gun, I believe that wuold be much better, don't yuo think, what number of stainlles steal wuold yuo recomend for the barel and the spear?
and please do write me deameters in cm, I don't undestant a thing.