BARSKA 3-12x40, Tactical Mil-Dot Side Parallax Riflescope 3-12x variable magnification with large 40mm objective lens in a 100 percent waterproof Fully multi-coated optics with Mil-Dot reticles BARSKA's Accu-lock system utilizes a coil-spring positioned within the scope to securely lock the inner tube Bonus accessories includes a set of mounting rings With fogproof extra rigid shockproof construction Which allows the scope to stay locked dead-on target