The RM66 features Rossis prized double action trigger, and a crisp single action trigger pull. The RM66s six-inch barrel pairs with fixed sights. The RM66 has 6 shots of .357 Magnum on tap in its steel cylinder. The full underlug barrel adds additional weight which helps manage magnum recoil. It uses a square butt configuration making the RM66 easier to shoot with full power magnums or 38 Specials.