The Crimson Trace Hardline Low Power Variable Optics are deliberately built for everyone from tactical professionals to backyard plinkers The Crimson Trace Low Power reticle is calibrated to be precise yet robust enough for the use of multiple calibers amongst multiple different platforms. All LPVOs feature a 34mm tube; aerospace grade anodized aluminum; fully multi-coated; Nitrogen purging prevents scopes from fogging in all environments. Glass etched reticles and quality glass allows for excellent field of view.