Spud gun

To operate, one punctures the surface of a potato with the gun's hollow tip and pries out a small pellet which fits in the muzzle.

Squeezing the grip causes a small build-up of air pressure inside the toy which propels the projectile.

Cossman, the brother-in-law of "Uncle" Milton Levine, sold two million spud guns in six months as a result of an advertising campaign.

[2] In Mexico City a company named WELCO created a similar model of a spud gun with a metallic appearance.

Tomas Welch, a Mexican Jewish chemical engineer, developed a spud gun named "TIRA PAPAS" (Spanish for "potato shooter").