Aim Sports Tactical series riflescope is milled from one solid piece of aircraft grade aluminum to withstand constant heavy recoil. It has a fog-proof and shock-resistant housing, and is nitrogen charged with weather-resistant seals. The green fused multi-coated lens provides superior light transmission, resolution and scratch resistance. Flip-up lens covers protect from dust and scratches while not in use. This scope has 2.7-3.3" eye relief that provides safety from heavy recoil and enables fast target acquisition. It is windage and elevation adjustable. This model is 3-9x40mm with an illuminated red/green Mil-Dot reticle and a 1" tube.