Sherlock Holmes: A Game of ShadowsSherlock Holmes: A Game of Shadows - Internet Movie Firearms Database - Guns in Movies, TV and Video GamesSherlock Holmes: A Game of Shadows
In the alleyway brawl, an attacker (uncredited) pulls a Webley Mk V on Sherlock Holmes (Robert Downey Jr.), but Holmes is able to take it away. Madam Simza Heron (Noomi Rapace) hands Holmes one before he and Watson (Jude Law) infiltrate the Meinhard factory.
Webley Bulldog
Mary Watson (Kelly Reilly) pulls out Watson's Webley Bulldog on their honeymoon train. Dr. Watson later uses it to fend off the assassins.
Chamelot-Delvigne Model 1874
Holmes fires upon the assassins with what appears to be a Chamelot-Delvigne Model 1874 revolver before handing it off to Watson. Officer's Model 1874 is blued and has fluted cylinder contrary to smooth cylinder of Model 1873.
Sharps Model 1A Pepperbox
Sherlock Holmes (Robert Downey, Jr.) carries a Sharps Model 1A Pepperbox pistol while dressed in drag on the train to Brighton, and Watson (Jude Law) uses it to disable one of Moriarty's henchmen manning the machine gun.
Mauser M712 Schnellfeuer
Colonel Sebastian Moran (Paul Anderson) shows Holmes with a box full of Mauser M712 Schnellfeuer pistols in the Meinhard factory in which Holmes later acquires one during the shootout in the factory.
Note: The use of this gun in the movie is anachronistic as it's set in 1891 while the original Mauser C96 appeared in the 1895, and the Mauser M712 used in the film wasn't commercially available until 1932. It is implied that the C96 design is a prototype developed by Moriarty's weapons designers for the impending war he desires to start.
Mle 1892 Revolver
Anarchist Claude Ravache (Thierry Neuvic) shoots himself with a Mle 1892 Revolver. Watson later picks it up to confront the other anarchists. Watson still has this revolver, or another copy when he and Holmes infiltrate the Meinhard factory.
N.B.This is another anachronism, when the film is set in 1891, one year before the revolver's availability.
One of Moriarty's train hitmen tries to fire a Winchester Model 1887 shotgun on Holmes and Watson, but sets himself on fire due to Holmes' sabotage. When Moriarty's attacker squeezes the trigger, a scene shows rifled barrel, which is incorrect, since most of the scatterguns are smoothbore.
Rifles
Mauser Gewehr Model 1888
1888 Commission Rifless (Gewehr Model 1888s) are used by the Meinhard guards and several men. Madam Simza, Holmes, Watson, and Moran use them during the factory escape.
Customized Martini-Henry Sniper Rifle
Col. Moran (Paul Anderson) uses a Customized Martini-Henry sniper rifle equipped with sniper scope, supressor, and bipod, which is fitting since he is an veteran of the Anglo-Afghan war. He's also described as the best shot in the army before his dismissal (which Watson erroneously refers to as a dishonorable discharge, which is reserved for enlisted men.)
Submachine Guns
Custom Submachine Guns (Zastava M56)
The train assassins, and later Watson (Jude Law) and several Meinhard guards use custom submachine guns. These guns are built from from Zastava M56 submachine guns by Bapty for the film. They stylistically resemble the Maxim 1895 Extra-Light machine gun. Interestingly, a pistol-caliber (7.63 mm Mauser) version of the Maxim Extra-Light was made during the late 19th century, though it used the same belt-feed mechanism as the normal Maxim instead of having a detachable magazine.
Machine Guns
Maxim 1895
Two of Moriarty's gunmen man use a .303 British caliber Maxim 1895 with brass water jacket, and spade grips in an attempt to kill Dr. and Mrs. Watson.
Gatling Gun
Meinhard guards use Gatling Guns fed from Broadwell drums.
Other
Grenades
The assassins on the train are equipped with grenades (which are similar to No. 2 Mk II "Hale" Grenades). Holmes uses one to set a booby trap. They are props made specifically for the movie.
7.58 cm Minenwerfer
Meinhard guards attack the escaping party with 7.58 cm Minenwerfers. This is yet another anachronism, as this weapon wasn't introduced until 1909.
Trivia
.223 Shell Casing
Colonel Moran is shown assembling a poison dart cartridge using a modern Winchester .223 shell casing.