Give it a try - Sightmark Laser Bore Sights

Good construction and bright laser but on the day I took it to the range it was very bright and at 30yds I could not see the red dot or else it was completely off the target had to wait until dusk and use the back wall of a house down the street to see if it (the laser) was actually showing a distance. It was so I adjusted W/E knobs till the cross hairs were centered on the red dot. Just got the corrections done when the batteries started to go out. Get extra batteries before you start, I did not so I'll have to wait till mine arrive and I am able to try again at the range. Note; batteries only last about 1/2 hrs. Hope to add to this post after my second try.