Beta Weapons are weapons that were removed from a GTA game during its development. It also includes some weapons that didn't make it to the final game and weapons have their models changed, and some still exist in the game files. Many made well during development and it is unknown why they were removed. However, most of them can be obtained through cheat device and trainers.
The Skateboard was cut from the PC version. It is primarily a melee weapon but also a vehicle. Available as a mod for the PC version but is not usable on the PS2 version.
The Micro SMG known from GTA VC was also removed, but can be seen in several early screenshots.
The PSG-1 , MP5-K, M16 , M-60, M249, M47 Dragon and M82 and Nail Bat were cut. Models of the weapons can be found in the game files but lack textures, and some files remain on the PS2 version of the game.