XS DXT2 Big Dot Tritium Night Sights offer the best front sight visibility in all lighting conditions. DXT2 Big Dot sights drive focus to the front sight using a high-contrast front and a V-notch rear for an unobstructed view of the front sight. 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 victim s focus is drawn to the threat. The wide field of view increases visibility of the front sight and of the threat downrange. Product Features Big Dot - Remains visible under stress when focus is drawn downrange. Outside diameter 0.188" Yellow Front Sight - High-contrast color designed for maximum visibility in bright to low light Glow Dot - Convex photoluminescent dot absorbs ambient light and glows in low light levels Tritium Powered Front & Rear Sight - Beta emitting lamps glow in low light to aid in sight alignment V-Notch Rear - Low-profile V provides greater visibility of objects downrange of front sight Dot-the-"i" Sight Picture - Straight line sight picture with differentiated front and rear sight prevents shooters from confusing the front and rear sight Rear Sight White Outline - Aids in rear sight identification for proper sight alignment Rear Sight Ledge - Aids in one-handed slide manipulations 10 Year Warranty - No Questions Asked night sight warranty Fits in common holsters Product Specifications Manufacturer: XS Sight Systems, Inc. Item Number: GL-0011S-5Y Fits: Glock 42, 43, 43X, & 48 DISCLAIMER: GLOCK is a federally registered trademark of GLOCK, Inc. and is one of many trademarks owned by GLOCK, Inc. or GLOCK Ges.mbH. Neither Sportsmans Outdoor Superstore nor this site are affiliated in any manner with, or otherwise endorsed by, GLOCK, Inc. or GLOCK Ges.mbH. The use of GLOCK on this page is merely to advertise the sale of GLOCK pistols, parts, or components. For genuine GLOCK, Inc. and GLOCK Ges.mbH products and parts visit www.glock.com.