Lynch's Revolver. Chambered in .480 (as seen on the side of the gun).
On the Revolver's another side you can see some words .
Shotguns
Remington 870
Lynch's shotgun.It has an extended tube.
Accurate to a decent range, shotgun pellets move in a cone pattern
Franchi SPAS-12
Used by Lynch in Cuba and Venezuelan jungle.It's fired in semi auto mode only.
Submachine Guns
Heckler and Koch MP5A3
Used by SWAT teams and gangsters in Tokyo club, one variant has a Surefire light. It is also the primary weapon for the thieves in the Fragile Alliance Mode
FN P90
Kane uses the P90 in the LA bank robbery level. Serves as Thapa's primary weapon.
Steyr TMP
Appears in early trailers, being wielded by Yakuza and Retomoto's bodyguards. Later cut from the game.
Assault Rifles
SIG SG 552
This is Kane's main weapon in the game, also featured on box art
Colt M4A1 Carbine
Used by Tokyo SAT, Cuban rebels, and L.A. SWAT. Serves as Shelly's primary weapon.
AK-74M
Used mostly by Cuban Soldiers.
AKM
Found on dead Cuban soldiers. Cannot be used by player.
Ruger Mini-14
Used by prison guards during the Breakout level.
Sniper Rifle
Remington 700P
Used by L.A.P.D SWAT, Tokyo Police, Retomoto's men. Carlos, Kane and Lynch in the Venezuelan jungle levels.
Carlos can't use it so player can change weapons with him .
Machine Guns
FN Minimi SPW
Used by one of the gangsters in Retomoto's skyscraper, later seen in Cuba and also seen during the prison escape by the guards in the towers.
PKM
Seen in the first cuban mission. Can be mounted by player.
Grenade Launcher
Heckler & Koch HK69A1
Used by SWAT teams and prison guards and later seen in Cuba.