Viridian's grip laser for NAA Magnum Frame Revolvers boasts a simple yet intuitive design and activates automatically when the user grips the handgun. Delivering rapid target acquisition when it's needed most, this grip laser features a highly visible red laser. Easy to install and adjust. Comfortable to grip and shoot with a rubber over molded design. Elevate your personal protection gun with a Viridian grip laser today! Like all Viridian laser sights, the grip lasers include an industry-best seven-year limited warranty. Features : Fits NAA Magnum Frame Revolvers Easy Installation 25-yard range in daylight and 1 mile at night Up to 4 hours on constant on time Grip activated with master on/off