557 Red Dot Kleur:Desert Weight: 330 g Shipping weight: Kleur:Everglade Weight: 330 g Shipping weight: 330 g Batteries: 2 x CR123 (not included) Length: 125 mm Weight: 120 g Shipping weight: 210 g Batteries: 2 x AA (not included) Aim O is one of the most reliable optics manufacturer for airsoft guns