The Soviet's Silenced Revolver: The OTS 38

From Breach Bang Clear: "OTS 38 Revolver: Stechkin’s Suppressed Wheelgun." This was a snub-nosed revolver that shot from a barrel at the bottom of the cylinder (like a Rhino revolver) to mitigate recoil and muzzle climb when a round was fired. There was no sound suppressor to attach, however. Rather it used a special rimless 7.62x42mm cartridge that each acted to suppress the sound. The article explains:

... The sound and flash of each round are fully contained within the cartridge case. Inside the case is a piston. After firing, the piston seals the cartridge’s neck. This eliminates the noise, smoke and flash by acting as a barrier after the round is touched off. In essence, each round acts as its own silencer.

[snip]

 This particular round was designed to be effective at up to 100′, and the sound signature is said to be at 110 dB with no muzzle flash. ...