This is a Ultradot Red Dot known as the Ultradot, model UD25S.
The UltraDot is the most compact" lightweight and streamlined sight on the market. Only 5.1 inches long and weighs just 3.9 oz. Built with 25mm diameter tube. Click adjustable brightness control.
Features:
1 MOA click adjustments
11 brightness settings
Backed with lifetime warranty from Ultradot
