The Riot Gun is a four barreled shotgun similar to a Pancor Jackhammer. It holds 52 shells and can fire one or four shells at a time.
Uzi 9mm
The Uzi appears in the game as the high-velocity firing gun, and is the most commonly used gun among the enemies in the game. It holds 200 rounds, 50 in each magazine, and can be dual-wielded. Lo Wang refers to the director John Woo after the Uzi are dual-wielded: "Be proud, Mr. Wu!".
Missile Launcher
The Missile Launcher in the game is a rocket launcher similar to a M202 FLASH rocket launcher. It can fire five heat seeking missiles if supplied with a heat seeker card, and a small atom bomb if a nuclear warhead is available. It holds 50 missiles.
Grenade Launcher
The game's grenade launcher is somewhat similar to a Milkor MGL. It holds 50 incendiary shells.
Railgun
When picking up the Railgun, protagonist Lo Wang refers to the movie Eraser, by saying "Time to get erased!". It fires metal rods at near light speed and can damage several enemies if they're lined up. It holds 20 rods.