Abstract: A projectile launcher includes a receiver and a dual cylindrical-shaped magazine (“DCM”) wherein the receiver contains a propelling mechanism and an ammunition receiving port. The propelling mechanism is used for launching a projectile. The ammunition receiving port, which may be situated at bottom of the receiver, is able to receive projectiles. It should be noted that the projectile launcher can also be a gun or firearm. The DCM includes two canisters and an ammunition supply port which is situated between the two canisters. The DCM carries multiple projectiles in such a way that a first portion of projectiles moves toward the receiver against gravity for supplying projectiles from the ammunition supply port to the ammunition receiving port while a second portion of projectiles move in a direction parallel to the receiver for replenishing projectiles from the second portion of projectiles to the first portion of projectiles.