This toy gun, the 'Johnny Seven O.M.A. (One Man Army)' was manufactured in England in the late 1960s by Deluxe-Topper Ltd, although this design was originally manufactured in the U.S.A. by Deluxe-Topper's parent company, Topper Toys. It is made from plastic and metal. It was first sold in the U.S.A. in 1964, and in the same year became the best-selling boy's toy. It was heavily marketed on television, and came in a very large, brightly-coloured box designed to catch a child's attention.

The gun was marketed as being 'seven guns in one', and had the capability to launch a grenade, an armour- piercing shell and anti-tank rocket. It had a retractable bi- pod, to convert the gun into a sniper rifle, as well as a repeating rifle action and a detachable pistol which could be loaded with small explosive caps which made a loud bang when fired. It could also convert into a Tommy gun (machine gun) with rat-a-tat sound effects and the possibility to remove the butt of the rifle to shorten the gun. There was nothing else on the market at the time with this range of gadgets, which made it particularly appealing. However, this product, along with similar toys, saw a down- turn in popularity as opposition to the Vietnam war increased in the U.S.A. and as the Peace movement in general, with it's questioning of war toys, also gained more popular support.