M2 Red Dot with L Shaped Mount Kleur:Zwart Caliber: 6mm Weight: 290 g Kleur:Everglade Caliber: 6mm Weight: 290 g Shipping weight: 360 g Material: T6061 Aircraft Aluminium Length: 155 mm Weight: 400 g Shipping weight: 70 g Batteries: 2 x LR44 (not included) Aim O is one of the most reliable optics manufacturer for airsoft guns