Laser Genetics ND3-Bow Subzero LASER Designator with Bow and Scope Mount
http://www.amazon.com/gp/product/B007T9C6OS?tag=sukses2015-20
O-Ring seals keep out water dust and dirt Nitrogen charged to prevent lens from fogging Adjustable Beam Rotary Optical Beam Collimator - Allows quick adjustment of beam diameter and intensity
Precision Machined From High Tech Aluminum Alloy Anodized Matte Black Finish Water Resistant FDA Safety Class 2M
Range 3 miles Power supplied by one lithium CR123A battery Included lasting up to 7 hours4 hours at 0 degrees F
Lens Diameter 26mm Weight 537 oz
1 Year Warranty