The Monstrum Marksman 1x Prism Scope is a prism scope optic with a true fixed 1x magnification. It offers similar functionality to 1x red dot sights for rapid short range target acquisition. But it uses a glass prism optical system with an illuminating circle dot reticle instead of the projected laser dots used in traditional red dot sights. Why choose a prism scope over a red dot sight? Sharper reticle than a red dot sight Red dot reticles are projected using a laser reflecting against a plane of glass and can result in a starburst effect at higher brightness intensities. They can be notoriously blurry for shooters with astigmatism. Prism scope reticles are etched in glass, produces less distortion than a red dot, and are easier for the eye to focus on, especially for shooters with astigmatism. Works with or without illumination Red dot reticles require both a powered laser source and an on/off mechanism. This makes them susceptible to running out of battery power or to malfunction. The prism scope reticles are etched into the glass and remain visible with or without illumination. Prism scopes can be offered with magnification Red dot sights are by design 1x optics. Prism scopes can be offered in a range of magnifications depending on your shooting needs. The 1x Marksman is built atop the same platform as our best selling 3x Marksman prism scope. It comes with an integrated 1.5 inch riser mount for true co-witnessing with your front sight. The picatinny base mounts to any standard picatinny mounting platform. It offers five levels of illumination in both red and green powered by a single CR2032 battery (included with purchase). The Marksman 1x prism scope is covered by Monstrums lifetime warranty. Specifications for Monstrum Marksman 1x20mm Prism Scope: Manufacturer: Monstrum Fabric/Material: 6061 Aircraft Aluminum Magnification: 1 x Objective Lens Diameter: 20 mm Reticle: Circle-Dot Reticle Illumination Color: Green, Red Eye Relief: 6 - 6.5 in Water Resistance Level: Yes Fogproof: Yes Weight: 11 oz Features of Monstrum Marksman 1x20mm Prism Scope Offers similar functionality to 1x red dot sights for rapid short range target acquisition, but it uses a glass prism optical system with an illuminating circle dot reticle instead of the projected laser dots used in traditional red dot sights Prism scope reticles are etched in glass, produces less distortion than red dots, and are easier for the eye to focus on, especially for shooters with astigmatism Package Contents: Monstrum Marksman 1x20mm Prism Scope Integrated 1.5in Riser