Ruger GP100

The GP100 is a double-action revolver made by Sturm, Ruger & Co., manufactured in the United States. It was introduced in 1985 as a second generation of the Ruger double-action, exposed-hammer revolvers and was later made  stronger with the intent to fire an unlimited number of full-power .357 Magnum rounds. Since its introduction, it has been produced in a number of variations with three basic barrel lengths , various barrel profiles , fixed or adjustable sights, and in blue carbon steel, and polished or satin stainless steel. 

Specifications