The guns 'special' rounds were quiet but lacked stopping power Since World War II, America's elite forces have used quiet firearms for missions where it pays to be silent. Sound suppressors—commonly referred known as silencers—remain in service today. What many don't know is that U.S. commandos once carried revolvers with special cartridges designed to muffle gunshots. In the 1960s, the AAI Corporation developed the cartridges for the U.S. Army's and Navy's rifles, pistols and shotguns. The U.S. Army Special Forces and Rangers tested the unique ammunition in Vietnam. While they offered many advantages, AAI's products failed to win any widespread...