Aimpoint Comp M4S The Aimpoint CompM4s sight, with low battery compartment, belongs to the CompM4 series sights which are the finest sights Aimpoint has ever produced. Improvements include improved energy efficiency that provides up to 8 years of continuous use from a single AA battery! High or low battery compartment To accommodate our customers, the CompM4 series of sights are available in two versions: The CompM4s offers a low battery compartment. This is the product shown here. The CompM4 offers a high battery compartment. Follow link to see the CompM4. In all other aspects, the Aimpoint CompM4 and Aimpoint CompM4s are identical. We choose to present these 2 sights separately on the website as they do look different. U.S. Army’s M68CCO The CompM4s is the latest version of the U.S. Army’s M68CCO (Close Combat Optic), continuing an Aimpoint legacy since 1997. Complete and ready to mount The CompM4s sight is shipped complete with a QRP2 mount and standard AR15 spacer. These sights also come equipped with a killFlash® anti-reflection device and MILSPEC rubber lens covers. Integral mount The CompM4s sight features an integral mount that eliminates the need for a separate ring, and can be customized with vertical and forward spacers to fit a variety of weapon systems. Designed for 3rd generation night vision technology The CompM4s sight can also be used by hunters and sport shooters who need night vision compatibility. The performance of CompM4s sight is optimized for use with all generations of night vision devices (NVDs), but is ideal for 3rd generation night vision technology.