A paintball transfer apparatus for feeding paintballs into a paintball marker, the paintball transfer apparatus comprising: a housing having a cavity wall with an inner surface, the cavity wall defining a cavity within the housing having an upper end and a lower end; a helical path formed along the cavity wall, the path being shaped to guide paintballs; an exit port defined at an end of the path adjacent to the upper end of the housing, the exit port being configured so that a paintball may exit the path through the exit port; a cylindrical roller, having an outer surface and an inner surface, positioned within the cavity and being configured to rotate about a roller axis; the inner surface of the roller defining an inner chamber in which paintballs may be stored with an upper end to receive paintballs downwardly thereinto the inner chamber by gravity and a lower end; the lower end being disposed above the lower end of the housing; the lower end of the roller having an opening along its circumference defined by a raised lower edge, dimensioned so that paintballs can pass through this opening from the inner chamber of the roller and then travel outwardly in the path in the cavity between an inner surface of the housing and an outer surface of the roller; a paintball guiding base having a sloped upper surface for directing paintballs from the inner chamber of the roller outwards to the path; a drive mechanism for rotating the roller; wherein the outer surface of the roller has a sufficiently high coefficient of friction such that when the roller rotates about its axis any paintball seated in the path is compelled to move along the path in the direction of rotation as captured between the roller and the inside surface of the cylinder; and wherein the drive mechanism causes rotation of the roller relative to the housing, thereby causing paintballs located between the cavity wall of the housing and the outer surface of the roller to travel upwardly along the path against the forces of gravity and out through the exit port. a housing having a cavity wall with an inner surface, the cavity wall defining a cavity within the housing having an upper end and a lower end; a helical path formed along the cavity wall, the path being shaped to guide paintballs; an exit port defined at an end of the path adjacent to the upper end of the housing, the exit port being configured so that a paintball may exit the path through the exit port; a cylindrical roller, having an outer surface and an inner surface, positioned within the cavity and being configured to rotate about a roller axis; the inner surface of the roller defining an inner chamber in which paintballs may be stored with an upper end to receive paintballs downwardly thereinto the inner chamber by gravity and a lower end; the lower end being disposed above the lower end of the housing; the lower end of the roller having an opening along its circumference defined by a raised lower edge, dimensioned so that paintballs can pass through this opening from the inner chamber of the roller and then travel outwardly in the path in the cavity between an inner surface of the housing and an outer surface of the roller; a paintball guiding base having a sloped upper surface for directing paintballs from the inner chamber of the roller outwards to the path; a drive mechanism for rotating the roller; wherein the outer surface of the roller has a sufficiently high coefficient of friction such that when the roller rotates about its axis any paintball seated in the path is compelled to move along the path in the direction of rotation as captured between the roller and the inside surface of the cylinder; and wherein the drive mechanism causes rotation of the roller relative to the housing, thereby causing paintballs located between the cavity wall of the housing and the outer surface of the roller to travel upwardly along the path against the forces of gravity and out through the exit port.