The HWS 518(TM) takes all the great features found in EOTECH&';s top sight, the EXPS, and improves upon them, making it even better. The HWS 518(TM) is designed to use easy-to-find AA batteries, which is a significant advantage for users who want to avoid the hassle of sourcing more specialized batteries. Additionally, the device is equipped with buttons on the side that allow the user to position it closer to the magnifier, thereby reducing the amount of rail space required. This can be especially useful for those who need to free up rail space for other accessories or who simply prefer a more compact setup. Overall, the HWS 518(TM) is an excellent option for anyone who wants a high-quality sight with all the latest features and the convenience of AA batteries.