500 Smith and Wesson arbor for use with the AimShot 30 carbine laser bore sight. This arbor will fit over the 30 carbine laser and allow you to bore sight any 500 Smith and Wesson (special or magnum) rifle or pistol. We recommend the MBS30 Carbine modular laser bore sight as it allows use in pistols when using the smaller batteries, or in single shot or rifles with the external AAA battery pack (20+ hours of battery life!).