A direct view optical sight having an integrated laser rangefinder and comprising: an eyepiece; an objective providing an optical aperture and configured to direct electromagnetic radiation from a viewed scene to the eyepiece; an erector tube assembly coupled between the eyepiece and the objective; the laser rangefinder configured to transmit and receive laser radiation; and a beam combiner assembly mounted to the erector tube assembly and positioned between the erector tube assembly and the objective, the beam combiner assembly configured to combine the laser radiation and the electromagnetic radiation to allow the laser rangefinder to transmit and receive the laser radiation via the optical aperture of the objective, and to maintain optical alignment of the laser rangefinder and the viewed scene during movement of the erector tube assembly; wherein the beam combiner assembly includes a first reflective surface configured to reflect the laser radiation and to transmit the electromagnetic radiation from the viewed scene to the erector tube assembly, and a second reflective surface configured to reflect the laser radiation to and from the first reflective surface; the direct view optical sight further comprising a display mounted to the beam combiner assembly, wherein the beam combiner assembly includes a third reflective surface configured to couple the display into an optical path to the eyepiece and to reflect light from the display via the erector tube assembly to the eyepiece; the direct view optical sight being characterized in that it further comprises a blocking filter selectively movable into and out of the optical path to the eyepiece, the blocking filter configured to block visible electromagnetic radiation from the viewed scene from reaching the eyepiece when positioned in the optical path, the blocking filter further configured to be substantially transparent to the laser radiation. an eyepiece; an objective providing an optical aperture and configured to direct electromagnetic radiation from a viewed scene to the eyepiece; an erector tube assembly coupled between the eyepiece and the objective; the laser rangefinder configured to transmit and receive laser radiation; and a beam combiner assembly mounted to the erector tube assembly and positioned between the erector tube assembly and the objective, the beam combiner assembly configured to combine the laser radiation and the electromagnetic radiation to allow the laser rangefinder to transmit and receive the laser radiation via the optical aperture of the objective, and to maintain optical alignment of the laser rangefinder and the viewed scene during movement of the erector tube assembly; wherein the beam combiner assembly includes a first reflective surface configured to reflect the laser radiation and to transmit the electromagnetic radiation from the viewed scene to the erector tube assembly, and a second reflective surface configured to reflect the laser radiation to and from the first reflective surface; the direct view optical sight further comprising a display mounted to the beam combiner assembly, wherein the beam combiner assembly includes a third reflective surface configured to couple the display into an optical path to the eyepiece and to reflect light from the display via the erector tube assembly to the eyepiece; the direct view optical sight being characterized in that it further comprises a blocking filter selectively movable into and out of the optical path to the eyepiece, the blocking filter configured to block visible electromagnetic radiation from the viewed scene from reaching the eyepiece when positioned in the optical path, the blocking filter further configured to be substantially transparent to the laser radiation.