RED-I LASER BORE SIGHT 40 CALIBER RED DOT COLLIMATOR INFRARED LASER MADE OF STAINLESS STEEL AND BRASS. WHEN THE BOLT IS CLOSED THE SIGHT ACTIVATES AND SHINES DIRECTLY DOWN THE BARREL ONTO THE TARGET. SET DISTANCE: FROM MT 25 TO MT 500. GROSS WEIGHT: 55 GRAMS. POWER: THREE 393 BATTERIES (INCLUDED). OUTPUT POWER: LESS THAN 1MW. CATEGORY: 2A. IT IS CONFORM TO STANDARD IEC EN 60825 FOR FREE SALE. DO NOT FIRE WITH LASER IN THE BARREL.