BT Paintball offers the 10-Round magazine from the SA-17 Paintball pistol as a stand-alone accessory. It is used as a quick reload for the pistol or as a low profile feed system for most BT 4 markers. The feed tube holds ten .68 caliber paintballs and can be mounted forwards or backwards to meet your needs. The magazine replaces the Picatinny mounted feed elbow of the BT 4 markers for extremely simple installation. The elbow design makes for quick reloads using standard 10-round tubes.