TacFire Official Product, 3-9x42 tactical compact size rifle scope is constructed of one solid piece of T6 6061 aircraft grade aluminum body. It is fog proof with shock resistant housing, nitrogen purged and O-ring sealed. It also features a quick focus eyepiece, external open target turrets to adjust your windage & elevation, cut sunshade to help reduce glare, additional 1/2" riser to use with mount & tri-illuminated reticle with 3 adjustable rheostat brightness settings to select from. Green fused, multi-coated & scratch resistant lens for optimal light transfer & superior clarity. This scope is perfect for both close quarter battle and long range shooting. It also comes equipped with an integrated quick detach mount and BDC calibrated for a .223 with a 55 grain bullet. It comes with a back up red dot sight & scope ring adaptor mount that is fully adjustable to rotate from left/right perfect for those who prefer a 45 degree offset functionality.