This pen is a pen and cap which unscrews and screws on the back of the pen. It has a refillable fountain pen insert you fill with ink that is easily found at any office supply chain. The cap is made to look like a shotgun shell with a clip that resembles a shotgun and the end is made to look like a .22 shell. The cap is made of a burl dyed red. The barrel of the pen is made of curly maple. The case for the pen is made to look like a tactical gun case.