TruGlos Crossbow Compact Scope is waterprooffogproof shockresistant and has a special range finding and trajectory compensating reticle. It features a generous 4 eye relief fullycoated lenses provide maximum brightness clarity and contrast. This model has a rubber eyeguard durable leaf spring for windage and elevation adjustments onepiece tube made of aircraft quality aluminum with a durable scratchresistant nonreflective Realtree APG finish.