With a 4:1 zoom first-focal plane design, illuminated glass reticles, 30mm tube and revolutionary LockDown Zero System, TANGO4 riflescopes are the ideal solution for mid to long range tactical engagements, designated marksmen, and hunting. A unified industrial design integrates functional components like LockDown Zero System (lockable turrets) and MOTAC (Motion Activated Illumination). Includes one free SBT (SIG Ballistic Turret) custom-lasered elevation dial calibrated to your unique ballistics and environmental conditions.