The Ruger GP100 Double-Action Revolvers are among the most comfortable shooting revolvers. The triple-locking cylinder is locked into the frame at the front, rear and bottom for more positive alignment and dependable operation shot after shot. The Ruger patented grip frame design easily accommodates a wide variety of custom grips and the patented transfer bar mechanism provides an unparalleled measure of security against accidental discharge. With no special tools required, GP100 maintenance and assembly is easy.