FiftyShot™ replacement cartridge filling gun. The FiftyShot™ filler is built in Germany of durable light-weight aluminum. It's hand contoured to allow pain-free high volume use. Cartridge volume is adjusted using an easy to read dial in 0.5ml increments from 0.5ml – 2.5ml. Oil is precision dosed with a tolerance of less than 1%. This product includes only the gun with oil barrel and indexing o-ring. FiftyShot™ Control Unit and Heating Barrel sold separately.