I am making a weapon of sorts and am curious if it will work. the project consists of two tubes, a smaller one inside a larger one. To the outer tube there is a slingshot attached, the inner one contains a projectile(arrow, spear, BB, rock). the inner tube is drawn outside of the outer tube with the tension on the sling shot. The inner tube is released and stops suddenly at the rear end of the outer tube. does the projectile continue outward at the same speed or will it not transfer the energy properly? The projectile is at the back of the inner tube.