Abstract: Handgun safety devices may prevent the loading of ammunition into a handgun. The safety devices may be inserted into a barrel of a handgun. The safety devices may extend into a firing chamber of the handgun to prevent a bullet from entering the chamber, or to prevent cylinder from rotating in a revolver. An end of the safety device may be configured to resemble the end of the barrel of the handgun. The safety devices may prevent a child, or someone unfamiliar with a handgun, from accidentally loading and discharging a gun. The safety devices may also allow a user of the gun who is familiar with the safety devices the ability to quickly remove the safety device and use the gun.