Line up the front and rear dots to increase your night fire accuracy with Trijicon Bright & Tough Night Sights for your Colt 1911 model handgun. Self-luminous tritium phosphor front and rear sights along with your instinctive shooting speed combine to put you on target without the need to change batteries or wait for powering-up. Shock-resistant construction and aluminum cylinders protect the lamps from damage. Sapphire jewel window distributes light evenly while white rings add daylight visibility. Metal body is manufactured to fit specific Colt makes and models Tritium-filled glass provides excellent illumination in little to low light Sapphire window evenly distributes light and protects against punctures Silicone rubber cushion gives shock-protection to the tritium filled glass Aluminum cylinders protect against heavy recoil and harsh cleaning solvents White rings on front and rear sights increase daylight visibility Trijicon CA01 fits 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) Trijicon CA10 fits Colt Combat Commander and stake-in front Para Ordnance P13 (excluding Limited version). The front sight tenon size measures 1/8 of an inch. Trijicon CA22 fits Enhanced Government model Order today!