Valken 1x30ST Red Dot SightDescription : The Valken 1x30ST Red Dot Sight is a low profile tactical optic for airsoft rifles or SMGs. The red dot sight has a 30mm objective lens, and comes with flip up lens covers. This airsoft optic has a rotary illumination control knob to adjust reticle intensity at 10 different brightness settings for better contrast against your target background. It also mounts to most 20mm picatinny and weaver rails with the included 30mm weaver rings.