Rugged dependability meets streamlined design with the all-new ROMEO-X Enclosed pistol red dot from SIG SAUER. Leveraging SIG's experience developing durable red-dot technologies trusted by militaries around the world, the ROMEO-X Enclosed optimizes strength and reliability for the concealed environment.Featuring a rugged 7075 aluminum housing with a fully enclosed, sealed, and Argon-purged optical system, the ROMEO-X Enclosed creates a rock-solid, distortion free, aiming solution for the most demanding shooters and circumstances.Equipped with a side-mounted battery compartment and SIG SAUER's patent-pending beryllium copper flexure system, the ROMEO-X Enclosed's deck height is the lowest in the industry, allowing for effortless co-witness with standard height irons and is available in both PRO and COMPACT standardized footprints.Building up SIG SAUER's DNA of trusted military innovation, the ROMEO-X Enclosed delivers streamlined dependability without compromise. ROMEO-X Enclosed. Where X marks the dot.Inspired by MIL-SPEC ROMEO-M17Rugged 7075 aluminum housingPatent-Pending Beyllium Copper Flexure Arm.Distortion free aspherical lens.MOTAC (Motion Activated Illumination)Low deck height for standard-height iron sight co-witness.20,000 hour battery life with side load battery.15 illumination settings including 3 night vision.Assembled in U.S.A.Fully enclosed, sealed, and Argon-purged optical system.