Abstract: This mounting assembly is particularly adapted for mounting telescopic sights on pistols. The mount base is secured to the pistol at its breechward end by a screw which is threaded into a tapped hole in the pistol, which tapped hole is conventionally formed at the factory and is standard on pistols. The muzzleward end of the mount base is secured to the pistol barrel or pistol frame by means of a clamp. A screw is threaded into the clamp and tightens the clamp against the mount base. The mount base is provided with opposed surfaces which are forced against complementary surfaces on the clamp to tighten the clamp about the barrel or frame of the pistol when the clamp is tightened against the base.

Abstract: A line of sight adjustment mechanism for an optical gun sight which includes windage and elevation screws which bear against an internal component of the sight that defines the line of sight of the sight. A spring biases the internal component against the windage and elevation screws. Hardened steel balls are set into the internal component and affixed thereto at approximate positions to provide point contact between the internal component and the windage and elevation screws, and between the internal component and the spring. Adjustment friction is thus reduced with a resultant reduction in tracking error.

Abstract: A mechanism for varying the power of a telescopic gun sight wherein the erector lenses are moved longitudinally of the sight. A cam sleeve is used in combination with plastic cam followers. Screws are passed through the cam followers and threaded into the erector lens cells to bias runners formed on the lens cells against the inside surface of the erector lens tube thereby loosening manufacturing tolerance requirements while providing smoother and more accurate lens movement and power change.

Abstract: An adjustable base suitable for mounting an optical sight on a firearm. The base contains spring-biased windage and elevation adjustments and a provision for locking the base in place to assure location accuracy and to absorb the firearm recoil.

Abstract: A telescopic sight for use on a firearm, which sight provides an eye relief of greater than about 3.0 inches and an exit pupil of greater than about 25 mm. so that the target as viewed through the scope will substantially fill the eyepiece. The scope reduces the necessity of close alignment of the viewer's eye with the optical axis of the scope, thus enabling the viewer to quickly pick up the target with the scope and fire.

Abstract: A one piece retaining member for use in a telescopic sight for imparting pivotal movement to an erector lens assembly. The erector lenses are housed in a tubular housing contained in the barrel of the sight. The retaining member includes means forming a pivot for the erector tube and means forming spring fingers for biasing the erector tube about the pivot.

Abstract: A collimated gun sight having a fluorescently illuminated reticle. The sight is contained in a single tube and is sized so as to be capable of being mounted on the muzzle of a gun.