A highly recommended optic for airsoft use is the Firefield IMPULSE 1x22 Compact Red Dot and the Weekend Warrior Shop got one for an unboxing video... "The Impulse 1x22 Dot Sight gives the shooter lightning-fast target acquisition. Thanks to the red or green reticle illumination, the shooter can choose his preferred reticle color for different situations. The Impulse 1x22 is machined from aluminum, finished in matte black, and is IPX5 rated for shock, fog and weather resistance. Weighing just 212g, this optic is perfect for your next SBR or lightweight MSR build. A CR2032 battery lasts from 15 to 240 hours (depending on the setting). The Impulse can handle recoil up to .308 caliber and comes with flip-up lens caps and battery."