Leupold Mk 4 M3 fixed 10x magnification with a 40mm objective and a 30mm body. This scope is used however is completely free of blemishes. Both the metal and the lenses appear to be in perfect condition. This model comes with the 308M BDC elevation dial which appears to be ideally suited for 168gr 308 rounds. I have found it to be spot on out to 600 yards during the time that it was mounted to a Remington 700P. This scope has a mil-dot reticle with 1/2 moa windage and 1 moa elevation adjustments. The 308M BDC elevation dial is marked in yardages and allows for lightning fast elevation adjustments when engaging targets at varying ranges. This scopes fixed magnification combined with its simplified BDC dial makes it a vary fast and simple tactical scope that does not require a sharp learning curve. This scope also comes with a Devtron scope coat cover and a set of Warne 30mm steel picatinny rings. The rings set the scope at an ideal height for most tactical applications without adding unnecessary weight. Thank you for looking.