Tactical shooters know all about extremes. The worst weather. Oppressively bright sun. Pitch darkness. The repeated recoil of automatic weapons. Whatever extremes you have to deal with, the XTS-135 Xtreme Tactical SpeedDot can handle it. It's waterproof, fogproof and shockproof and the sight's high definition 5 MOA red dot has 11 brightness settings to adapt to the full range of light. Matched up with Burris XTR Rings, the tough little sight can be mounted ultra-low for superior compactness or high enough to clear iron sights.