Some experimental Dan Wesson Suppressors were in fact made in an attempt to see IF by reducing cylinder-forcing cone gap, the noise signature could be reduced. It didn't work out. They were never a team issue item.
Main problem was 357 Mag is supersonic....reducing velocity to sub sonic means 38 Special.
Many prototypes are made for LE and Spec ops...you may have fired one.
They were never purchased or assigned a national stock number (NSN) as they were just another technology experiment that verified why revolvers are not supressed.
The original question was regarding silencers for revolvers.
In practical terms, it doesnt work. If legal in your state, buy one in .22lr and you will have more fun than you can imagine !