BARSKA 4-16x50 IR Tactical Riflescope
http://www.amazon.com/gp/product/B001JJCHFM?tag=sukses2015-20
4-16x variable magnification with large 50mm objective lens in a 100 waterproof and fogproof extra rigid shockproof construction
Fully multi-coated optics with Illuminated Mil-Dot glass etched reticles with first focal plane
Allows precision adjustment with a side parallax adjustments in a turret-mounted focus knob
BARSKAs 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
Focal plane in which the reticle expands as the magnification increases creating dead-on accuracy