The Spec Ops Pen S.O.P.R. (Standard Issue) from TOPS Knives is made from a single-piece of coyote tan polymer for excellent weight and strength characteristics. The Spec OPS pen features a replaceable Fisher Space Pen cartridge. These pens are able to write just about anywhere in the most extreme conditions and even upside-down. The Spec Ops Standard Issue pen comes with a Kydex sheath and ball chain for neck carry.