When were suppressors for pistols originally developed? I'm thinking sometime in the .30s. The Allies used a suppressed High-Standard .22 pistol during the War, didn't they? I've heard somewhere that early suppressors were so heavy that they prevented recoil-operated handguns from cycling properly. Is this true? I know other suppressed weapons during the Second World War include the De Lisle carbine and the integrally suppressed STEN, but what about pistols? Thanks!