weapon glint
Glint is a property of reflective surfaces when a strong light bounces off the surface in such a way that the luminosity of the light is reflected along with the light image. This will give the appearance that an object is emitting light.
This tag should be used for weapons that represent glint such as sparkle shapes (concave diamonds, and crosses), or localized glow near their surface. If the entire weapon has a glow, it is most likely emitting light, and should be tagged glowing_weapon.