ERATAC T0540-1355 Offset 45 Degree Angle Front Backup-Sight w/.07" Post ERATAC’s Offset-Sights are nearly identical to their standard picatinny rail Backup-Sights, but are mounted at a 45-degree angle. This allows them to be used as a close-range aiming solution without having to remove the optic. The Offset-Sights feature a low profile design, and can be folded down when not in use to reduce the risk of snagging. Features of the ERATAC Offset-Sights: Tool free height adjustmentsReplaceable postsCan be folded down when not in useCan be converted to accommodate left handed shootersAvailable in HK-style (front sight) ERATAC Offset 45 Degree Angle Front Backup-Sight w/.07" Post T0540-1355