No adapter plate was included like the directions mentioned - Firefield Laser Bore Sight

In the directions, it states it comes with an adapter plate for ARs. Mine did not. I had to use a washer to center the magnet in the AR barrel. Otherwise, it worked as advertised. It gets you close enough and saves you some ammo in the zeroing in process. Besides that, only a person comfortable in their own skin will whip this baby out at the gun range! �