Abstract: Detachable hologram assembly for a compact holographic sight includes a hologram of a reticle image or other desired alignment indicia mounted within a resilient, detachable frame. The frame includes a pair of generally planar, non-parallel registration surfaces and an aperture extending through the frame at the junction of the registration surfaces. A hologram mount, also including a pair of registration surfaces which are complimentary to those of the frame is affixed to, or integral with, the sight. A fastener secures the hologram assembly to the mount with a force sufficient to maintain the registration surfaces of the frame in frictional fit, respectively, with the corresponding registration surfaces of the mount.