A similar system is used in the spotting rifles on the LAW 80 and Shoulder-launched Multipurpose Assault Weapon use a 9mm, . 308 Winchester based cartridge with a . 22 Hornet blank cartridge in place of the primer.
22.
Some weapons such as the M40 recoilless rifle and the LAW 80 have a smaller caliber " spotting rifle " mounted in " coaxial " fashion on the weapon's barrel, which allows the operator to visualise where the primary weapon's projectile will hit.
