WILLIAMS WGRS-RU22 - An economical set that includes the compact low profile Williams Guide Receiver Sight and the appropriate height front sight. The Guide Receiver Sight features simple, positive screw-lock windage and elevation adjustments. In most cases, the sight utilizes the existing scope mounting screw holes or dovetail on top of the receiver for installation. Red fiber optic Fire Sight included. 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.