How did Sammy gravano kill?

Sammy Gravano, a former underboss of the Gambino crime family, was involved in numerous criminal activities, but he is most infamous for his role as a hitman. He participated in several murders, including the assassination of Paul Castellano in 1985, which was orchestrated to help solidify John Gotti's power within the organization. Gravano later became a government witness, providing detailed testimony against other mobsters, which led to numerous convictions and a significant weakening of the Gambino family.