The Nailgun is a weapon that was cut from Grand Theft Auto: Vice City. Not much is known about the weapon but it was most likely a weaker version of the Pistol featured in the game. Its model (nailgun.dff) and its textures (nailgun.txd), still remain on the PS2 disc. The Nailgun can also be seen in Tooled Up.
The Nailgun was cut from GTA IV too, there's a fully functional model in the game files and it works like a machine gun, to use the Nailgun, you can replace the pistol with it by editing the game files, it works like a machine gun when used. video
The Nailgun is featured as a weapon in Manhunt, another controversial video game released by Rockstar Games in 2003.
The Nailgun can be used through game file edits, which if done has infinite ammo but does no damage to pedestrians.