Abstract: A pneumatic gun alignment system for accurately adjusting a gun position. The pneumatic gun alignment system includes a support bag having an air bag positionable beneath a firearm, and an air supply fluidly connected to the air bag for supplying pressurized air to the air bag. A valve unit is preferably positioned within the hose for allowing the user to slowly release air from the air bag and for maintaining a desired amount of air within the air bag. The user increases the air pressure to elevate the firearm and decreases the air pressure to lower the firearm.