Illuminated first focal plane MOA AHMR2 reticle for precise targeting at all zoom levels; Locking turrets with true precision zero stop for reliable and consistent adjustments; Advanced fully multicoated optics for maximum light transmission and clarity; Durable 6061T6 aircraft-grade aluminum construction with heat-treated one-piece tube; Waterproof, fog proof, and shockproof design to withstand harsh conditions and heavy recoil; Argon purged for enhanced thermal stability and moisture prevention