CCOP 1-6x24 CQB Tactical Rifle Scope, 30mm, Red/Green Windage/Elevation Target Turrets with Zero locking and relocking features One piece construction 30mm Tube, precision machined from Aircraft Grade Aluminum Alloy Red & Green Illuminated Etched Glass Reticle 100% waterproof, fog proof and shockproof tested Rigorously field tested for performance