thumb|Trilux Small Arms Sight Unit thumb|upright=1.35|Sight attached to an L85A2 The Sight Unit Small Arms, Trilux, or SUSAT, is a 4× telescopic sight, with tritium-powered illumination utilised at dusk or dawn. The full name of the current model is the SUSAT L9A1. The sight is not designed as a sniper sight, but is rather intended to be mounted on a variety of rifles and to be used by all infantrymen.
thumb|Trilux Small Arms Sight Unit thumb|upright=1.35|Sight attached to an L85A2 The Sight Unit Small Arms, Trilux, or SUSAT, is a 4× telescopic sight, with tritium-powered illumination utilised at dusk or dawn. The full name of the current model is the SUSAT L9A1. The sight is not designed as a sniper sight, but is rather intended to be mounted on a variety of rifles and to be used by all infantrymen.
Similar devices include the Advanced Combat Optical Gunsight (ACOG), manufactured by Trijicon, and the Elcan Specter.
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