This boresighter for a 12-gauge shotgun incorporates a heavy-duty red laser bore sight with a solid brass housing. This 12-gauge shotgun laser bore sight uses a Class IIIA red laser with a power output of -5mW. How does a boresighter work for 12-gauge shotgun? You simply load the 12 Gauge cartridge laser bore sight like a standard 12-gauge shotgun shell and a laser dot will show exactly where the rifle is aiming; it's simple to sight in any scope without firing a single shot. Live fire is only required to fine-tune the weapon being sighted, compensating for irregularities such as bullet drop owing to distance. Takes 3 AG13. Batteries included.
