| 摘要 |
PURPOSE: A gun is provided to shot by sighting a target accurately when the brightness of the target is too weak to be identified at night. CONSTITUTION: An optical layer(12) is formed by coating an optical agent formed of strontium carbonate(SrCO3) and alumina(Al2O3) mixed with an adhesive agent on the inner face of the backsight or the foresight. The backsight and the foresight are identified even at night by the optical layer. The optical layer emits light for long time. Thereby, a user sights a target accurately as long as the ambient brightness enables the identification of the target.
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