We think this is the most user-friendly EOTech Holosight in the market and it's available at Airsoft Extreme... "Shortest model sight yet! This sight is smaller than the former N-cell battery sight (511/551) and runs on a single 123 battery. It also has a longer battery life than the N-cell style sights. Smaller,lighter and always fast with three reticle options.

With th­e new sing­le battery configuration, the XPS allows more rail space than ever, leaving more room for rear iron sights or NV mount. Click Image to order yours today!"

This ain't a replica folks. We guess you have to wait a little bit further if you want an ACM replica.