I have a Sitelite M150 professional boresight that I just don't use. I've had it for about a month and originally ordered it with a handgun adapter. Sitelite boresites are made to fit any caliber rifle. It also includes a handgun adapter so that you can use it with any caliber handgun. It uses earth magnets to center it in the barrel and different size o-rings to make it fit and so that no metal touches the guns internal rifling. I'd like to sell this for 150.00 OBO or trade from some kind of pocket/small caliber pistol I'm open to offers.