I know that this is not exactly field gear but think this is the best forum to post this. I have spent many years without a bore sighter but have decided better late than never. I am currently looking at a Bushnell laser bore sighter at a great price on Optics Planet. With the various attachments that come with it, it can be used in everything from 22 cal to 50 cal. I am looking for comments on this bore sighter or another that you particularly like.