The Taurus GX4’s Longer slide adds 1′ of length when compared to the GX4 increasing muzzle velocity and sight radius, making it easier to maintain accuracy. The standard backstrap profile features a slight palm swell. Those who favor a higher wrist position for natural point-of-aim can install the included high-swell backstrap. Direct thread, no plate system accommodates today’s most popular red dot optics including: Shield RMSc, Holosun HS507K X2, Sightmark Mini Shot A-Spec M3, Trijicon RMR cc Red Dot with adapter plate (not included). A blackout steel serrated drift adjustable rear sight and fixed white dot front sight promote fast target acquisition when not running a red dot. Includes Riton Red Dot and two magazines.