The Sig Sauer JULIET3 Micro MSAR Compatible 3x 22mm Magnifier's Automatic Modified Reticle senses compatible magnifiers and automatically adjusts reticle configuration. The JULIET3's high performance lens coatings provide excellent performance in varied lighting conditions. FeaturesHigh Performance Lens Coatings including Dielectric Coated Prism for Excellent LightTransmissionUltra-Compact Size and WeightAircraft Grade Aluminum Housing ensures lifetime of reliable servicePowercam90 QR MountMIL-810-STD DurabilityDependable IPX8 Waterproof and Fogproof PerformanceInifinite Guarantee