DXT2 Big Dot 'Yellow' - Glock 42, 43, 43X, & 48 Tritium powered front sight Choice of tritium or non-tritium rear Big Dot front measures 0.188" High-contrast colored front sight Glow dot absorbs ambient light and glows in low light Low-profile V rear provides greater visibility of front sight Simple dot-the-"i" sight picture Rear sight white outline with tritium center Rear sight ledge for one-handed slide manipulations Durable CNC machined steel Fits standard holster options Yellow Front Sight - High-contrast color designed for maximum visibility in bright to low light DXT2 Night Sights are defensive tritium sights designed to enhance your EDC pistol. The front sight uses a proprietary photoluminescent Glow Dot that absorbs ambient light and glows in low light. The convex dot's additional surface area increases light absorption, intensifying the charge of the Glow Dot. We designed the DXT2 sights to be large and highly visible; this helps solve many issues, from aging eyes to deteriorating vision. We've found that the orange front tends to be most visible in daylight settings and that yellow glows brighter in low light. The shallow V rear has a simple, low profile that provides a wide field of view. The dot-the "i" sight picture, with a tritium dot in the front and a tritium bar in the rear, prevent confusing the front and rear sight in high-stress situations. In most gunfights, the victim and attacker are moving, and the victim is threat-focused. DXT2 Night sights are big, bright, and easy to see day or night