Yea that's what I am talking about but can you dry fire with it in the chamber without hurting the gun or the bore sight.
Depends on how long the bore sight is and how long the barrel is. I was suggesting the bore sight so yo could work on your grip and sight alignment. For you to dry fire your glock you'd have to cycly the slide each time. And the laser would be on all the time, not activating with the dry fire.
I used the bore sight, in an empty gun to get the point of aim working, bringing the gun up to the firing position from the side (holster position)so the point of aim came naturally. The laser gives me the point of impact.