Abstract: A weapon display device includes a display engine, a waveguide, and a chassis. The display engine is configured to selectively output light. The waveguide is configured to receive the light from the display and output graphics to the user. The chassis is coupled to the display engine and the waveguide, and is further configured to releasably mount to one of a weapon or an optic mounted to the weapon such that a field of view through the waveguide is aligned with an optical axis of the optic.

Abstract: A weapon sight includes a chassis and an optical system. The chassis is coupleable to a firearm. The optical system is coupled to the chassis and includes a light source, a collimator, a mirror, a diffraction grating, and a hologram. The light source is a light emitting diode (LED) that emits light. The collimator receives the light from the light source and reflects the light in parallel rays. The folding mirror receives the light from the collimator and reflects the light in the parallel rays. The diffraction grating receives the light from the folding mirror and diffracts the light. The hologram receives the light from the diffraction grating to output a reticle visible by a user of the weapon sight.