Truglo TFO Brite-Site Series Novak 1911 .270/.450
These sights are designed for 1911 Government style handguns with existing fixed Novak LoMount dovetail cut slides, however some fitting may be required. TRUGLO recommends installation by a competent gunsmith, with appropriate sight installation tools. The 45ACP pistol require Novak LoMount with .260 front/.450 rear. In addition, the 9mm or 40S&W require Novak LoMount with .270 front/.450 rear.