AIMSHOT LASER BORE SIGHT - SPEEDAIM •SpeedAim red laser bore sight designed to be an entry level bore sight & is compatible w/all of AimSHOT rifle caliber arbors. Utilizing the 223 laser other calibers are a hollow “arbor” where you insert the 223 laser. One precision 223 laser is used in all of the rifle calibers arbors. Also compatible with the new AimSHOT modular battery pack (MBP223 not included). Packaged w/nylon storage pouch & 3 LR41/AG3 batteries.