Firing projectiles through materials without causing any damage is not possible. Any projectile, no matter how small or fast, will cause some level of damage to the material it passes through. The amount of damage will depend on the projectile's size, speed, and the material's properties.

For example, a small bullet fired from a gun will cause a small hole in a piece of paper. A larger bullet, or one fired from a more powerful gun, will cause a larger hole. A projectile fired at a high speed will cause more damage than one fired at a low speed. And a projectile fired at a harder material will cause more damage than one fired at a softer material.

In some cases, it may be possible to minimize the damage caused by a projectile by using a special type of projectile or by firing it at a specific angle. However, it is impossible to completely eliminate the risk of damage.