The Crimson Trace Hardline optics are designed with the tactical and target shooter in mind and have been built from the ground up. The line features aluminum grade tubes that are designed to handle abuse. The scope features Crimson Trace Custom BDC .223/5.56 reticle, exposed turrets, generous eye relief to get back on target quickly. They are green multi-coated, nitrogen purged, waterproof, shock proof and ready for whatever elements they encounter.