The SIG Sauer ROMEO ZERO is a compact red dot sight ideal for mounting on pistols or pistol caliber carbines. This small but powerful optic is ideal for your quick acquisition shooting needs. Whether you are looking for something for personal protection, duty, or competition, the ROMEO ZERO is the ideal Micro Red Dot Sight. 3 MOA red dot. 8 User-selectable brightness levels. 20,000 hours of runtime on one battery (included). Item is new in box/packaging.