FWIW, I can't find a mount for this laser sight that fits 20 gauge. They are all made for a 12 gauge magazine tube or barrel. I found some black plastic pipe the perfect size for a sleeve shim, but the stuff is slick, wants to creep due to recoil. I got some rosin powder but haven't tried it yet. I have looked and not found a simple metal shim to adapt 12 gauge clamp mount to a 20 gauge. Anyone know of such a shim or of a better idea for a DIY shim material? Hmmm... going to go see what I have in aluminum pole/pipe/fishing net handles etc.
