Amazon.com : LaserLyte MBS-PAK Universal Laser Bore Sight Accessory Kit with Bubble Level, Daylight Target, Shotgun Adapters, Extra Batteries and Carrying Case Black 8" x 5.5" x 1.75" : Gun Scopes :
Bore Alignment Laser Systems by Hamar | Laser Brain
Understanding the Importance of Bore Alignment
Laser Bore Alignment Systems that Simplify Your Work
Laser alignment system - L-708, L-708LD - Hamar Laser - bore / high-accuracy