Rubber band and a clothes pin.
My next venture will be the toy gun black market.
Lived in NYC. Made a double barrel over under. Could shoot four milk bottle tops wid dat. Shoot two, flip it shoot two more.
My Dad taught me how to use the jigsaw on his Shopsmith but wouldn’t buy me toy guns because they broke too easily.
So I churned out five foot long pine gunstocks, mounted clothes pins on them wrapped with innertube strips, and we kids fired innertube bands at one another. When I saw my first Davy Crockett episode, the stocks became even longer with bent tenpenny nails simulating flintlocks. Then came my infamous double barrel model with a quick followup shot.
Simpler times.......