The Truglo Brite-Site TFX Pro Day/Night Sights will not fit your 1911.You would need to use Government style sights like the Truglo TFO 1911 Government W/Novak LoMount Fiber Optic sight, found by using the link below:
https://www.opticsplanet.com/truglo-tg131nti1-tfo-1911-government-w-novak-lomount-fiber-optic-green.html