Most Versatile Scope Designed for Model 4, 15 and Model 16 Variants with Integral Carry Handle See-thru Mount * One-piece Construction with Aircraft-grade Aluminum Tube for Maximum Strength, Completely Sealed and Nitrogen Filled, Shockproof, Fogproof and Rainproof * Range Estimating Mil-dot Reticle * Integral Carry Handle Mount and Low Profile Flat Top Adaptor * Flip-open Lens Cover Included