Williams is proud to offer the Fire Sight line of replaceable gun sights. Fire sights are designed around fiber optic nodes which gather ambient light to enhance the sight picture. Fire Sights do offer a much higher level of visibility and better sight picture. After installing these on your gun you will immediately notice that your ability to acquire the target will be much faster over stock sights. Measure your rear sight. If it's overall length is longer than 1" this is the sight to use. If it is shorter than 1", use model 70232. (REAR SIGHT LENGTH OVER 1") NOTE: this model is not compatible with any Buckmark that has an optic rail. FEATURES: Type: Fiber Optic Front/Rear Frame Material: Aluminum Frame Color: Black Fits Browning Buckmark Style: Adjustable Front Material: Fiber Optic Rear Material: Fiber Optic Front Color: Red Rear Color: Green Windage Adjustment: Yes Elevation Adjustment: Yes About Williams Williams Gun Sight Company was started in 1926 by Harvey Williams as a sight manufacture. The company grew its sight manufacturing business over the years then developed a retail store and shooting ranges in Davison, Michigan. In recent years, Williams is the oldest sight company that provides sights to many different gun manufactures.