The BSA 3-12x40 Tactical Weapon Scope is designed to engage targets at multiple ranges and in various lighting conditions thanks to its wide 40mm diameter objective. Features a 3-12x zoom for close-ups on distant targets, anti-reflection coatings for improving brightness and reducing glare, and a mil-dot reticle for precision shooting. The reticle can be adjusted to achieve parallax-free performance from 10 yards to infinity. This scope is specifically designed for .223 and .308 cartridges with trajectory compensation from 100 to 500 yards. The .223 turret is calibrated for 150gr, 168gr, and 180 gr rounds. The .308 turret is calibrated for 150gr, 168, and 180 gr bullets. Comes with an aluminum, cantilever one-piece Weaver/Picatinny mount. Built with aluminum housing, this scope has a 1? diameter tube and is waterproof, fog-proof, and shockproof.