The Trijicon MRO HD with 68 MOA reticle is a rifle/carbine optic - bigger window, wider field of view, and a 68 MOA circle reticle option for fast-acquisition close-range work. Sold without a mount (mount sold separately or use your existing rail-mounted ring). Specs: Reticle: 68 MOA circle reticle (large, fast-acquisition) Tube: 1x25mm Housing: 6061-T6 aluminum Battery: CR2032 Battery life: extended HD-generation runtime Includes: optic only, no mount Waterproof: submersible Use case: AR-15, AK-pattern, shotgun. The 68 MOA reticle is built for speed at close-to-mid range. If you want a dot for precision at distance, the MRO HD also offers smaller-reticle variants - verify which model you're getting before ordering.