Cowboyr was one of the figures in a line of 3-3/4" action figures bearing the same name by Remco.
The Sgt. Rock figures were depicted in Vietnam-era fatigues and gear and came with an M-16 rifle instead of a Thompson submachine gun. These US troops also had Vietnam-Era equipment and helmets and helmet covers and/or berets, they were collectively referred to as "Tough Action Soldiers". While Sgt. Rock was the leader of Easy Company in the comics, none of the other members of Easy Company were made into this line.
Each Sgt. Rock Tough Action Soldier came with one plastic dog tag with a unique serial number where children could write their own rank as well as their name.