XS Sights R3D Tritium Night Sights for Glock 20, 21, 29, 30, 30S, 37, 40, and 41 (Green)Elevate your Glock with XS Sights R3D Tritium Night Sights the ultimate solution for low light shooting. These sights fit a wide variety of Glock models like Glock 20, 21, 29, 30, 30S, 37, 40, and 41. With XS Sights' R3D Night Sights, you'll be able to shoot with confidence no matter what the lighting conditions are. R3D sights are CNC machined from solid steel bar stock. Tritium Front Sight R3D Night Sights feature traditional 3 dot tritium, notch