The Fission 3.0 comes with a supremely versatile base that fits a Weaver/Picatinny rail and is also directly mountable to Leupold DeltaPoint Pro standard by virtue of its special footprint. This highly advanced red dot is also waterproof and is equipped with a 12-hour auto shut-off system to prevent battery consumption. Includes special DeltaPoint Pro Mount for direct mounting on compatible weapons. Length 1.80" Proofs Waterproof Weight 2.11 oz Reticle 4 MOA Red Dot Dot Size 4 MOA Objective 25mm x 18mm Eye Relief Unlimited Magnification 1x Windage Elevation Adjustable