Abstract: A liquid dispensing gun having a dispensing limiter and a fill limiter which are utilized to regulate the volume of liquid dispensed to an animal. The liquid dispensing gun also includes an interchangeable cone and a shaft having a t-handle, a piston, a locking mechanism, and a plurality of positioning notches adapted for engagement to the dispensing limiter and fill limiter. A cylinder having a quick release end cap is engaged to the cone and a spring is positioned within the cylinder and engaged to the piston and to the cone for providing a spring assisted dispensing gun which minimizes the stress and/or fatigue to the hand and/or arm of a user. The dispensing gun is preferably adapted for use as a drench gun providing a user with the ability to utilize one hand on the dispensing gun and the free hand to control an animal during the introduction of drench to an animal.