The XPS2 is the shortest model sight yet and runs on a single 123 battery. It also has a longer battery life than the N-cell style sights. The single battery configuration allows more rail space than ever, leaving more room for rear iron sights or magnification. It has 20 brightness settings and a scrolling feature. This model is not night vision compatible. EXPS has a 65 MOA circle with a 1 MOA dot, a 7mm raised base, easily adjustable side buttons, and a locking quick detach lever.