BUS1166 Features: * Two legendary Burris technologies are perfectly suited for the nuances of handgun shooting * Posi-Lock secures the point-of-impact in the face of abusive recoil * The high arching trajectories of many handgun calibers complicates shooting long range, unless the scope is equipped with Ballistic Plex * Visit burrisoptics.com for complete details on how effective Ballistic Plex is with specific caliber/load/barrel lengths * Extremely robust outer tubes and internal components * Adjustment system is repeatable steel on steel with audible clicks * Double internal spring force * Some of the competition competitors offer a double spring whereas the double spring is the STANDARD for all Burris products * Burris uses specially made quad seals to provide double insurance against leakage