The Trijicon Bright & Tough Night Sights feature the standard 3-Dot sight picture and can help increase the shooters accuracy when in low-light conditions. These shock resistant sights have a metal body for housing and a silicon rubber cushion. The lamps are contained in an aluminum cylinder and each lamp has a sapphire jewel at the cap for protection and even light distribution. Compatible with Colt models: Colt Govt., 1911, Combat Elite, Delta Elite models made after 1988. Also fits Para Ordnance P10 and P14 with stake-in front (excluding the Limited versions).