Description EOTech Style 551 Red and Green Holographic Sight Replica (Black) Red and Green Holographic Sight – Multi Fade -Full metal construction -10 levels of Red and Green (NV) dot brightness control -65 MOA ring/1 MOA dot reticle -power safe feature, automatic power-off in 2 hours -fits all standard 20mm Weaver / Picatinny rail -Length: 100 mm -Weight: 320 grams -1 x 551 sight -1 x Instruction Manual