The Angle Cosine Indi­cator (ACI) is an indis­pens­able sniper tool for long range precision shots when aiming up or down­hill. The ACI helps you to easily calcu­late and correct the gravity’s effect on your bullet’s trajectory.

The bubble level enables the shooter to under­stand if the gun is completely level. Our ERATAC® mount with ACI and bubble level can be easily attached to our UNIVERSAL-Inter­face. It is not neces­sary to alter the posi­tion of the scope. The posi­tion of the ACI is such that the red needle is visible even when using a scope with the illu­mi­na­tion control on the left side and while already aiming.

The Mil-Spec. version is water­proof for 35 min. and 1 meter­depth of water. The posi­tion of the eleva­tion turret alwaysre­mains visible because of the lateral bubble level.