[[Image:M29S&W4.jpg|thumb|none|400px|Smith & Wesson Model 29 with 4" barrel.]]
[[Image:M29S&W4.jpg|thumb|none|400px|Smith & Wesson Model 29 with 4" barrel.]]
[[Image:PaybackS&W27-1.jpg|thumb|none|600px|The pawn shop owner hands Porter a Smith & Wesson Model 29 from off the rack. His lack of gun safety is pretty obvious as he hands him the gun with the hammer cocked and his finger on the trigger.]]
[[Image:PaybackS&W27-1.jpg|thumb|none|600px|The pawn shop owner hands Porter a Smith & Wesson Model 29 from off the rack. His lack of gun safety is pretty obvious as he hands him the gun with the hammer cocked and his finger on the trigger.]]
[[Image:PaybackS&W27-2.jpg|thumb|none|600px|'''Left:''' Porter swings open the cylinder and spins it. A ratcheting sound effect is heard even though there is nothing for the cylinder to ratchet against. '''Right:''' Porter examines the gun like a real pro by pointing the muzzle at himself.]]
[[Image:PaybackS&W27-2.jpg|thumb|none|600px|'''Left:''' Porter swings open the cylinder and spins it. A ratcheting sound effect is heard even though there is nothing for the cylinder to ratchet against. '''Right:''' Porter examines the gun like a real pro by pointing the muzzle at himself.Note the smooth topstrap. Consistent with a Model 29. See the discussion page for comparisons.]]
[[Image:PaybackS&W27-3.jpg|thumb|none|600px|After doing some flashy twirling, Porter hands the shop owner the Model 29 back to make a purchase. Without a background check it is doubtful he would have actually made the purchase. For some reason he isn't shown buying cartridges either...]]
[[Image:PaybackS&W27-3.jpg|thumb|none|600px|After doing some flashy twirling, Porter hands the shop owner the Model 29 back to make a purchase. Without a background check it is doubtful he would have actually made the purchase. For some reason he isn't shown buying cartridges either...]]
[[Image:PaybackS&W27-4.jpg|thumb|none|600px|Porter searches his wife's house with his Model 29 at the ready. He has a "USMC" tattoo on his shoulder, so you'd assume he'd know how to clear a room. Instead he does what is typically done in films and wanders around the house with the revolver cocked and pointed at the ceiling.]]
[[Image:PaybackS&W27-4.jpg|thumb|none|600px|Porter searches his wife's house with his Model 29 at the ready. He has a "USMC" tattoo on his shoulder, so you'd assume he'd know how to clear a room. Instead he does what is typically done in films and wanders around the house with the revolver cocked and pointed at the ceiling.]]
Porter (Mel Gibson) uses a blued Smith & Wesson Model 29 4" with S&W factory combat grips for the majority of the film after buying it in a pawn shop. It is not a Smith & Wesson Model 27 as previously mentioned, as the diameter of the muzzle and cylinder chambers is clearly too large to be .357 Magnum. Also the barrel on the Model 27 has a slight taper while the barrel on the M29 is a heavy "bull" barrel. In addition the forcing cone on the Model 27 is visible and the cylinder is shorter on the Model 27. The cylinder on the Model 29 fills the frame. Like the one used in the movie.In addition the Model 27 has very fine checkering on the top strap. Observe the stills that show the top strap on the revolver being used by Mel Gibson. It's smooth which is another feature of the Model 29.See the discussion page for comparisons.
Val Resnick (Gregg Henry) carries a Beretta 92FS pistol as his main sidearm, which Porter (Mel Gibson) takes from him and uses for the rest of the film.
Pearl (Lucy Liu) carries a Walther PPK with pearl grips (possibly in relation with her name) as her sidearm.
SIG-Sauer P220
The Triad van driver is seen firing a SIG-Sauer P220 through the floor of the van at Porter (Mel Gibson). Earlier in the film Porter is seen taking a SIG P220 from one of Carter's (William Devane) guards after knocking him out with a roll of pennies and then using it to kill him. They are noted as the P220 model by their lack of double stack bulges on the frame, and their .45-sized muzzle diameters.
M3 "Grease Gun"
When Porter (Mel Gibson) is attacked by the Triad gang members, two of them are seen firing M3 "Grease Guns". They clearly have external charging handles, helping to identify them as older M3s, not M3A1s.
Glock 17
One of the Triad gang members is seen using a 2nd Generation Glock 17 to shoot at Porter (Mel Gibson) in the taxi cab. Later Porter is seen disposing of two Glock 17s after killing two thugs in the restroom.
The two Glocks Porter takes from the restroom thugs appear to be first generation models due to their lack of ridges in the grips.
Radioman (Kwame Amoaku) tries to save Arthur Stegman (David Paymer) with a sawed-off Remington 870 shotgun before being mowed down by the Triads. Based on the sling swivel on the pistol grip, it is assumed this gun was professional sawed down by a film armorer.
One of Carter's (William Devane) bodyguards is seen armed with a Heckler & Koch P7M8 before Porter (Mel Gibson) knocks him out with a roll of pennies. An Outfit member is seen firing one at Porter during the final firefight as well.
I am pretty sure this is a HK P7 and not a M8. Look at the first pic. The gun lacks the mag release latches on the trigger guard, and the guard itself is much smaller like the P7 over the M8, biggest give away is the gun shown lacks the heat shield in the trigger guard.
Ruger Mark II
An Outfit thug at the train station opens his lunchbox to reveal Ruger Mark II pistol with an integral suppressor.
Walther P38
Inside the pawn shop, a Walther P38 is seen hanging on the pistol rack, along with several unknown revolvers.