The Gun is made of heavy-duty brass and is plated with copper, nickel and chrome and will not readily serrate as aluminum can. The barrel end is specially curved in to eliminate sharp edges which could injure the animal&,39s mouth. The Gun is easily disassembled for thorough cleaning. Gun will hold boluses up to 480 grams. A barrel stop may be adjusted to control the number of boluses given to prevent accidentally administering more than desired.