The W33's four explosive yields were all greater than that of the W48. M422 projectiles were hand-assembled in the field to provide the required yield, three yielding 5 to 10 kilotons and one with 40 kilotons. There was also a ballistically matched spotting round (HES M424) and a special white bag charge system, M80, composed of charges one through three. The M423 ordnance training rounds and their associated "bird cages" can be seen at the National Atomic Museum in Albuquerque, New Mexico.