The Nikon M223 Rifle Scope is a tactical scope designed for use on AR-style rifles or tactical bolt action rifles. The scope features Nikon's Ultra ClearCoat Optical System to provide up to 95% light transmission, 4 inches of constant eye relief and a sturdy 1-piece tube. Another feature of the M223 is the new return to zero turrets which simplify adjustments for different ranges at the range or in the field. All Nikon products include Nikon USA's full or limited warranty. The Nikon M223 Rifle Scope is covered by a lifetime factory warranty.