Just when you thought the EOTech 500 series couldn't get tougher, they rolled out the EOTech 553 holographic weapon sight. Designed to meet the nearly impossible demands of the US Special Operations Command, the EO Tech 553 expands upon the tough as nails durability of the EOTech 552 series. Waterproof up to an amazing 66ft and temperature resistant from -40 to 150 F, the 553 model burns an astounding 1100 continuous hours on two 123 lithium batteries. This exceptional sight also allows for lighting quick adjustment with a quick detachment lever. So don't wait, pick up a EOTech 553 Tan or black model direct from Webyshops and get free ground shipping and EOTech's 2 year warranty included. Receive FREE Ground Shipping on all orders over $39.99.