Longer slide adds 1 inch of length when compared to the GX4increasing muzzle velocity and sight radius, making it easier to maintain accuracy. 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. A blackout steel serrated drift adjustable rear sight and fixed (white dot) front sight promote fast target acquisition when not running a red dot. Delivers accuracy and predictability courtesy of its crisp, precise sear break and the pleasingly short and tactile reset that is fundamental to quick, on-target follow-up shots