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
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 another one before he and Watson (Jude Law) infiltrate the Meinhard factory.
Webley Bulldog
Mary Watson (Kelly Reilly) pulls out Watson's Webley Bulldog. Dr. Watson later uses it to fend off the assassins.
Webley No. 5
Holmes fires upon the assassins with a what appears to be a Webley No.5 revolver before handing it off to Watson.
Sharps Pepperbox
Sherlock Holmes (Robert Downey, Jr.) carries a Sharps 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 C96
Colonel Sebastian Moran (Paul Anderson) confronts Holmes with a Mauser C96 in the Meinhard factory. The use of this gun in the movie is rather anachronistic as its set in 1891 and the C96 was first produced in 1896. 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.
One of Moriarty's train hitmen tries to fire Winchester Model 1887 shotgun on Holmes and Watson, but sets himself on fire due to Holmes' sabotage.
Rifles
Mauser Gewehr 1888
Mauser Gewehr 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 , 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 only reserved for enlisted men.)
Other
Maxim 1895
Two of Moriarty's gunmen man a Maxim 1895 with brass water jacket, and spade grips in an attempt to kill Dr. and Mrs. Watson.
Custom Submachine Gun
The train assassins and later Watson use what appear to be steampunk inspired custom submachine guns. They load from the top, and appear to be only capable of being fired from the hip.
Gatling Gun
Meinhard guards use Gatling Guns fed from Broadwell drums.
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.