This rifle scope is part of the SLx optics line. SLx optics built the reputation for innovation, reliability and value. All SLx optics undergo rigorous field-testing during development to best serve you in any environment. The Primary Arms 1-6x24 second focal plane scope (Gen III) features the exclusive, patented Advanced Combined Sighting System Aurora reticle. Bullet drop compensation, wind holds, moving target leads and range estimation are seamlessly integrated into an easy to use, instinctive sighting system that is very fast from 0-300 meters and very accurate from 300-800 meters. The second focal plane design keeps the reticle the same size at all magnifications for quick acquisition at low power and advanced reticle functionality at 6x maximum power. Specifications for Primary Arms SLx 5-25x56mm Rifle Scope, 34mm Tube, First Focal Plane (FFP): Manufacturer: Primary Arms Objective Lens Diameter: 56 mm Magnification: 5 - 25 x Tube Diameter: 34 mm Reticle Focal Plane: First Focal Plane (FFP) Finish: Matte Color: Black Battery Type: CR2032, Stand Alone Lithium Fabric/Material: Aluminum Water Resistance Level: Waterproof Shockproof: Yes Fogproof: Yes Package Type: Box Gun Type: Rifle Features of Primary Arms SLx 5-25x56mm Rifle Scope, 34mm Tube, First Focal Plane (FFP): 4in of eye relief High strength one-piece aluminum body Compact design is 13.98in long Premium grade glass Tactile and audible .1 MIL click value Integrated return-to-zero Elevation rotation indicators Integrated magnification lever Package Contents: Primary Arms SLx 5-25x56mm Rifle Scope, 34mm Tube, First Focal Plane (FFP)