Browning's Buck Mark reflex sight is a way to add extra ease of shooting and accuracy to your rifle. It features four reticle patterns- 3 MOA Dot, Cross-Dot Reticle, Circle-Dot-Cross Reticle, Circle Dot Reticle; seven-position brightness rheostat; rugged aluminum housing with matte black finish. Current version mounts to a standard Picatinny style base* *IMPORTANT: Some earlier versions of this sight had a Weaver-style rail attachment. Before purchasing, check the packaging to confirm that the sight you have fits the base on your firearm. The general rule is that "Weaver devices will fit on Picatinny rails, but Picatinny devices will not always fit on Weaver rails."