The following weapons were seen in the film Infernal Affairs:
Colt Detective Special (Third Generation)
Third Generation Colt Detective Special revolvers are the primary weapon of the Hong Kong Police Force Crime and Security Department officers in the film. Inspector Lau Kin-Ming (Andy Lau) is armed with this revolver at the end of the film before being disarmed by Chan Wing-Yan (Tony Leung).
Police detectives stand by to raid the drug deal.
Detective with his Detective Special during the shootout with the Triads.
Inspector Lau Kin-Ming's revolver in its holster.
Chan Wing-Yan shakes the rounds out of Lau's weapon.
Smith & Wesson Model 36
Inspector B (Gordon Lam) carries a Smith & Wesson Model 36.
Smith and Wesson Model 36 - .38 Special - 5 shot. First pattern with flat latch cylinder release.
Inspector B approaches Superintendent Wong's body. His revolver has five chambers in the cylinder.
Smith & Wesson Model 10
Smith & Wesson Model 10 revolvers are the primary side arm of uniformed officers of the Hong Kong Police Force. The weapon is seen at the end of the film when Inspector Lau leaves the elevator to awaiting uniformed personnel. It seems as though some officers carry the standard version of the Model 10 while others are equipped with the heavy barreled variant.
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.
Lau trains with his Model 10 as a cadet.
Lau aims his Model 10 and his cap badge is Royal Hong Kong Police
Two police officers with thier weapons drawn at the lift lobby.
Several officers armed with S&W Model 10s, a Colt Official Polices, and Colt Detective Specials aimed at the lift
Colt Official Police
A Colt Official Police is seen in the hands of a police officer in the lobby.
Colt Official Police - 4" Barrel - .38 Special
Several officers armed with S&W Model 10s, a Colt Official Polices, and Colt Detective Specials aimed at the lift
Glock 17
Chan Wing-Yan (Tony Leung) uses a second generation Glock 17 in the final scene when he holds Inspector Lau Kin-Ming (Andy Lau) hostage on the roof top. A well known goof to the audience is when Yan draws his Glock on Lau, it clearly has no magazine, but in later shots his Glock has a magazine.
Yan draws his Glock 17 on Lau. You can clearly see his Glock has no magazine! (film error)
Close up of Yan's Glock aimed at Lau's head
Yan taking Inspector Ming hostage with a Glock 17
Yan backs away with Lau in tow
Inspector "B" handing Yan's Glock 17 to Inspector Lau
Taurus PT92
Taurus PT92 pistols are used by triads througout the film, notably in the shootout immediately following Superintendent Wong's (Anthony Wong) murder.
A triad fires his Taurus at the Detectives. Notice the other triad is firing his Taurus sideways.
A fallen triad with his PT92 by his side
Short Magazine Lee-Enfield
A young Lau Kin-Ming (Edison Chen) is seen drilling with Short Magazine Lee-Enfield (SMLE) during the montage of his training as a cadet.
Lee-Enfield No.1 Mk.III* - .303 British. This was the main battle rifle of British and Commonwealth forces during the First World War, introduced in 1907 it has seen action throughout the 20th century. It would make sense for it to be in Hong Kong, a former British Colony.
Closer view of the fore end of the SMLE. The "ears" that protect the rear tangent sights are visible, but not the sights themselves, which might suggest that this is just a non-firing drill rifle.
See Also