When the action is fast, target acquisition and accuracy are paramount. SIG's miniature, open reflex ROMEO1 sight withstands the punishment of deployment while delivering pinpoint accuracy and lightning-fast targeting. Even after 10,000 rounds of .45-caliber punishment, the ROMEO1 will have you accurately engaging targets. Lightweight CNC Magnesium housing and TRUHOLD lockless zeroing system endures the repeated recoil of modern semi-automatic pistols, MSR platforms and shotguns. MOTAC motion sensing technology makes sure the 3 MOA dot is there when you draw and shuts down if you forget to save battery life. ALT precision-molded aspheric lens with high performance coatings increases light transmittance and reduces distortion. Top-loading battery compartment allows for quick changes without needing to remove your optic. TRUHOLD lockless zeroing system utilizes twin adjustment springs designed and tested to endure handgun recoil and keep returning to zero ALT (Aspheric Lens Technology) creates a precision molded lens with reduced weight and improved optical performance CNC machined magnesium housing is lightweight and durable LENSARMOR abrasion-resistant coating keeps your lens sharp, bright and clear MOTAC motion sensing technology powers up as soon as you draw and shuts down during non-use to save battery life 3 MOA Red dot reticle with with multiple intensity settings ensures rapid target engagement under a full range of lighting conditions Tested to maintain zero at over 10,000 rounds of 230 grain, .45 ACP Powered by a widely available CR1632 battery in a top-load battery compartment Order today!