The M-388 could be launched from either of two launchers known as the Davy Crockett Weapon System(s): the M28, with a range of about , or the M29, with a range of . Both weapons fired the same projectile, propelled using a separate cartridge. The smaller M28 used a explosive cartridge to launch the warhead. The larger M29 used an 11-pound or a propellant charge, depending on the desired range. The launcher systems were muzzleloading weapons. As they were intended for a very low rate of fire a breechloading mechanism was unnecessary.