The Ultradot Gen 2 25mm has been our tried and true workhorse for the last thirty years. But at the request of our loyal shooters the next generation was born. Hard to improve on such a reliable and consistent companion to your firearm, but we somehow got more precise with the 2 MOA dot. Only 128mm (5.1 inches) long and weighs just 110g (3.9 oz). Built with a 25mm (1 inch) diameter tube. Click adjustable brightness control.