HOLY WARRIOR MEPRO O2 Red & Green Dot Sight

HOLY WARRIOR MEPRO O2 Red & Green Dot Sight Aluminum Construction Airsoft RDS Red Dot Sight (Lightweight) With 7 Daylight & 3 Nightlight Automatic brightness control Automatic Sleep and Wake Up System ("shake-awake" function) Fit For Attach on 20mm Picatinny Rail Mount Powered by CR123 Batteries