Accelerated accuracy that takes up just 2.75" of rail space.The exps2 hws features green-reticle technology approximately 5x easier to see than red in daylight and leaves plenty of rail space for adding a magnifier and other attachments.Durable, lower third iron sight co-witness and ergonomic, side-button adjustment all in a rock-solid unit with an adjustable, quick-detach locking lever.Features auto shut down at 8 hours.Battery: CR123Magnification: 1xObjective: 1.20"/30 mm x 0.85"/23 mmField Of View: 30 yds at 100 ydsEye Relief: UnlimitedDot Size: 1 MOA/68 MOALength: 3.80"/96.5 mmWeight: 11.20 oz/317.5 gFinish: Black AnodizedReticle: 1 MOA Green Dot/ 68 MOA Green RingAdjustment Size: 0.50 MOAProofs: Fog Proof/Water ResistantOptic Coating: Anti-ReflectionWindage Elevation: Adjustable