USED XS Sight Systems DXT2 Big Dot Sight S&W M&P OR Full Size Compact Yellow. DXT2 Big Dot sights drive focus to the front sight using an industry leading large high-contrast front and a low profile V-notch rear. DXT2 Big Dot front sights use a patent pending glow dot that absorbs light and glows in low light levels before it is dark enough to see the tritium. Optic Yellow is the best option for low light and has the brightest glow intensity. Primarily based on the white light spectrum optic yellow is very reflective and will excite the photoluminescent properties of the dot faster than any other color. The increased surface area of the convex dot increases light absorption intensifying the charge of the glow properties of the dot. The dot-the i sight picture with a tritium dot in the front sight and a tritium bar in the rear prevents confusing the front and rear sight in high-stress situations. In most gunfights the victim and attacker are both moving and the victims focus is drawn to the threat. The wide field of view increases visibility of the front sight and of the threat downrange. Outside Diameter Big Dot 0.188"; fits in common holsters. Installation might require filing to fit sight to dovetail do not use a sight press/pusher tool. Fits Para Ordnance with factory adjustable rear sight. Specifications for XS Sight Systems DXT2 Big Dot Sight: Manufacturer: XS Sight Systems Gun Make: Smith & Wesson Gun Model: Smith & Wesson M&P Full Size Smith & Wesson M&P Smith & Wesson M&P Compact Color: Yellow Features of XS Sight Systems DXT2 Big Dot Sight: Steel sight with blued finish; Green tritium front and rear; Optic Yellow photoluminescent ring front; Snag-free design; No Questions Asked Warranty Package Contents: XS Sight Systems DXT2 Big Dot Sight XS Sight Systems SW-0039S-5Y: DXT2 Big Dot Sight S&W M&P OR Full Size Compact Yellow