The charge dart rifle was taken from the design of a sniper rifle, only the muzzle of the barrel was modified so that it was longer and only made a "spitting" noise when fired. The Dart would be a small, barbed metallic bolt (which would be pretty painful to pull out when it is inside someone) with a long coil attatched to it (about 15 feet long) which could be reeled in like a fishing rod after being fired.