Weapons are at the forefront of every Grand Theft Auto games and the weapons that appeared in the debut trailer of Grand Theft Auto V, may be present or cut in the final release. The following list of weapons may not appear in the final game as they have not been officially confirmed.
Melee
Fist
The Fist has appeared in all Grand Theft Auto games, they mainly represent the unarmed state of the player. Fists are the first resort to fighting in early missions but will become useless as more deadly weapons will be introduced.
Golf Club
The
Golf Clubs made its appearance in the GTA V trailer, possibly returning once more as a weapon.
Nightstick
A Nightstick also appeared in the GTA V Trailer when three LSPD officers were chasing a criminal. The weapon can be seen in the black police officers holster and but it is unknow if it will be made available to the player as a melee weapon.
Handguns
Glock
A handgun is also seen in the GTA V trailer where a member of the LSPD is seen holding one. It resembles a Glock. In most Grand Theft Auto games a weak handgun such as the Glock is usually the first gun the player will obtain. The standard issue sidearm of the LAPD (on which the LSPD is based) is currently the Glock 22, which was used by the LCPD (NYPD) in GTA IV but it is unconfirmed if this is the model in-game.
Assault Rifle
AK-47
The iconic AK-47 appears in the GTA V trailer, consisting a different layout. The AK in the trailer appears to be based on the Norinco Type 56-2, also the AK-47 seems to be more textured and more realistic. It has several accessories and modifications including a side-folding butt stocks, olive drab polymer furniture, side mounted lasers and sound suppressors, which leads to the possibility of weapon customization and modification in GTA V.
M4A1
A GTA screenshot shows a SWAT (possibly NOOSE) officer aiming a weapon at an escaping Infernus. The weapon in question is most likely the M4A1 since from GTA IV, police shoot assault rifles from helicopters.
A SWAT/NOOSE officer using what is possibly a customized Carbine Rifle.
Thrown
Litter is shown a few times in the trailer and in screenshots which leads to the possibility that the player can pick up litter and throw it like in GTA IV.
Miscellanous
Parachute
The Parachute will apear in the game as seen in a Screenshot. It has the similar appearence from The Ballad Of Gay Tony but with a different backpack and more strings attached.
Weapon customization and attachments
Suppressor
A Suppressor is seen in the trailer which leads to the fact that you can put suppressor's on weapons and possibly customise weapons to some extent. The purpose of a suppressor is to hush the sound of gunshots and dampen the flash from the barrel.
Laser Sight
A Laser Sight is seen twice in screenshots for Grand Theft Auto V. In the two screenshots the laser sight is used by the Los Santos Police Department in a Police Maverick. The color of the laser emitted is red.