CRIMSON TRACE HARDLINE RIFLESCOPE 3-9X40 BDC .223/5.56 RETICLE The Crimson Trace Hardline optics are designed with the tactical and target shooter in mind and have been purposefully built from the ground up. The line features aerospace grade 1� and 30mm tubes that are designed to handle abuse. The line offers generous eye relief to get back on target quickly. They are fully multi-coated, nitrogen purged, waterproof, and ready for whatever elements they encounter. All Crimson Trace scopes are covered under the LIFETIME protection guaranteed warranty.