Projectile Seperate texture

Basically you can choose to make an arrow texture for what it looks like in 3d using the normal way arrows are made and look like 2 textures in an X of eachother making the arrow or you can make a custom projectile texture so when people make guns and theres a shotgun shell for ammo they arent firing the whole shotgun shell instead the projectiles (You wouldnt shoot the whole arrow AND BOW at someone would you??)