The HD-10 is a compact, closed red dot sight for use with modern sporting rifles,carbines,shotguns, crossbows and air rifles. The HD-10 features a crisp, bright 1 MOA dot for rapid target acquisition in any situation. The sight comes with a 1.4linch absolute co-witness Torx cross-bolt riser mounts and select SKUs include alow profile mount, Your HD-10 features MOTACrm which will extend your runtimebeyond 40,000 hours of normal use.