Ultimate Arms Gear Tactical Pro Panoramic Multi 4 Reticle Red Dot Open Tubeless Reflex Scope Sight Adjustable Brightness with Weaver-Picatinny 7/8" Rail Mount 4 Seperate Reticles.Full Windage and Elevation Adjustments & Adjustable Brightness Settings Intensity Control. Weaver Picatinny 7/8" System To Lock Onto Mount. Durable Matte Black Finish & Parallax-free 34mm Coated Reflex Lens Lightweight Aluminum Construction: Only 6.25 oz (180g) Compact: 3.6" Long x 2" Tall x 1.5" Wide Powered by Three LR44 Batteries - Batteries Included