Military Arms: Offensive: Sling
Source: TTT
1 Samuel 17:50
Thus David prevailed over the Philistine with a sling and a stone; without a sword in his hand he struck down the Philistine and killed him.
2 Kings 3:25
They destroyed the cities, and each man threw stones on every good field until it was covered. They stopped up every spring and cut down every good tree. Only Kir-haraseth was left with stones in place, but men with slings surrounded it and attacked it as well.