A durable, impact-resistant syringe that provides a quick bottle-changing system for efficient application of all animal health injectables. The self-contained, one-handed unit is ideal for full mobility and automatic refilling of syringes and prevents the injectable returning to the bottle. The line feed convertible barrels allow convenient change from a bottle mount to a line feed vaccinator. Packaged in a premium box with a clear window designed for shelves and hanging and contains: 100ml/20mm Fast Fit, 250ml/30mm Fast Fit, three bottle collars (20 mm, 30 mm, and 33 mm), one metal luer lock needle nut, one soft medical grade tubing, one uni-lock system and one lube packet.