The following weapons were used in the film Saw III:
Jeff (Angus Macfadyen) locates a Beretta 92FS and one round through the course of the game and ends up using it to shoot and kill Amanda.
Jeff loads the one bullet he was given in the Beretta he now has.
Jeff's game begins closing as he searches the building for his wife with Beretta in hand.
Smith & Wesson Model 5946
Eric Matthews (Donnie Wahlberg) has his Smith & Wesson 5946 from the previous film in this film's opening after waking up in the bathroom, only to discover that the magazine is empty. Later Amanda (Shawnee Smith) is armed with it and uses it to threaten Lynn frequently before ultimately shooting her with it.
When Amanda fires it, it sounds as though it is suppressed
Smith & Wesson 5946 9x19mm
Amanda (Shawnee Smith
) begins to get emotional and on edge with her acquired Eric Matthews sidearm.
Good close up of the pistol showing night sights as Amanda throws it up to shoot Lynn.
Smith & Wesson Model 10 HB
In a flashback, we see Jeff (Angus Macfadyen) in a state of anger over the death of his son pointing his personal Smith & Wesson Model 10 in the mirror imagining a confrontation between him and the man who hit his son with a car.
Smith & Wesson Model 10 HB (heavy barrel) revolver (Post 1950s Model) - .38 Special. Later incarnations of the Model 10 had a non-tapered heavy barrel, which leads it to be commonly mistaken for a .357 revolver.
Close-up of the gun as Jeff points it at the mirror.
Smith & Wesson Model 686
In another flashback, we see John Kramer/Jigsaw (Tobin Bell) setting up the scenario from the first Saw. He has the Smith & Wesson Model 686 in his hand as he lays down as he appeared in the first movie.
Smith & Wesson Model 686 4" Barrel - .357 Magnum.
Detective Allison Kerry (Dina Meyer) pulls a SIG-Sauer P226 from her nightstand when she suspects that Jigsaw is in her closet, she then fires a few shots through the closet door before being kidnapped.
Kerry begins to make her way toward her closet cautiously with the SIG in her hand.
Kerry cautiously approaches the closet to clear it after putting a few rounds in the door.
Heckler & Koch MP5A3
The Heckler & Koch MP5A3 9mm SMG equipped with tactical lights and laser sights can be seen in the hands of the SWAT team breaching a welded shut door in the abandoned school to discover a man who has been a victim of a Jigsaw trap.
Heckler & Koch MP5A3 9x19mm with Surefire 628 dedicated forend weaponlight and safe-semi-two round burst trigger group.
SWAT team member with the MP5A3 stock collapsed in.
Heckler & Koch UMP
When the SWAT team breaches the room in the school near the opening, SWAT Commander Riggs\ (Lyriq Bent) can be seen with a Heckler & Koch UMP equipped with a light and laser with the stock folded in.
Heckler & Koch UMP .45 ACP
Unknown Double-barrel 12 Gauge
This 12 Gauge shotgun is seen in one of Jigsaw's traps and blows the face off Judge Halden when Jeff (Angus Macfadyen) retrieves the key that is tied to the trigger of it.
A sawn-off shotgun with exposed hammers, much like the one seen in the film, 12 gauge
Jeff inspects the glass box containing the rigged up booby trap with the shotgun with the key he has to retrieve in front of the muzzle.
Jeff tries to gently free the key from the string connected to the shotgun trigger.
Any little movement of the string connected to it moves the mechanism attached to the shotgun.