There are hundreds of revolvers to choose from made by Colt, Smith and Wesson, RUGER, Taurus, Rossi, and others in every just about every caliber from .32 to 44 magnum.
The Ruger pictured started as a .357 magnum, ported and plated to brush chrome and the usual AP&W gunsmithing magic applied. The Ruger has a reputation for strength and reliability. It's a stout frame but the .357 round needs a stout frame.
The tune and the porting tame this firearm and make a very serious personal protection piece out of it. Thats power and control. Generally the Ruger's come with what we call a factory tune, sort of like shaving with a blade that's been used twenty times. Bob's street tune makes the gun handle differently. I can control mine. The difference is amazing.
Smith and Wesson, Ruger LCR, Taurus, Rossi, and similar Snub Noses,
Most double action, hammer or hammerless models, etc.
Note: Restrictions apply on some models when safety enters the equation based on
initial construction of the firearm. Also "key" models.
Most upgrades are common to both models in aluminum and Steel.