TAC Vector Optics Grimlock 1-6x 24mm IR Compact Hunting Riflescope Illuminated Red Green Dot #4 Reticle Weapon Sight Shock proof, Water Proof and Fog Proof (Nitrogen Purged) High quality aluminum alloy in durable black matte finish Feature 1/2" windage and elevation adjustments (100 yards) Fast focus eyepiece at ocular lens adjustment (diopter compensation -3 to 2) Free fitting involved: 30mm low weaver (default) or dovetail mount, cleaning cloth and cap