Laser indicator laser calibrator red Easy to operate lightweight laser pointer, calibrator. It comes with an 8-piece set of hole adapters, compatible with calibers from .177 do .50. The collimator is installed in the barrel of the firearm and emits a red beam of light from the axis of the hole, which provides a precise reference do zeroing the target. Just choose the right caliber adapter and place the device in the barrel. It has a long aiming range, is lightweight and durable. It allows you to quickly and accurately zero any sights and check the settings of the scope at any time. It also allows you to quickly and accurately reset the sight, regardless of its type (e.g. iron, optical, holographic). Attention! Avoid direct exposure of the eyes to the light beam. Technical data: Material: High quality T6061 aluminum alloy Power Supply: 1*CR2 Battery Size: 165 x 18 mm Diameter: 4,2 mm Power: < 5MW