During the scene when Jim West is going through the aversion therapy in the room with the bells, there are a number of times when he brings his hands up to his ears, you can see that there is forearm padding under his coat.
When West is handed the gun the first time by the doctor, he fires three times. On the first and third shot, the small explosion that happens at the end of the barrel when a round is triggered occurs. On the second shot, there is nothing that comes out the end of the barrel. Likely caused by a misfire, which no sound would have occurred.
West is being tortured supposedly for hours by the bells ringing. On two shots, a thin rope is seen attached to the arm that holds the bells. The rope would have been pulled to ring the bells. Someone with the cunning of West would have noticed this rope in the hours of torture and either untied it or cut it as it was not out of his reach.
At one point during his conditioning, West breaks free long enough to send a signal using a blanket held in front of the lighthouse's light. A sailor on a passing ship reports, "Captain, this is strange, I've picked up a blinker SOS." His captain responds, "What's so strange about a ship in distress Mr. Hale?". "The Wild Wild West" was set during the administration of Ulysses S. Grant (1869-1877). "SOS" did not become a standard for international distress calls until 1905, and even then it took some time for it to replace the older "CQD" signal.
Not only was "SOS" anachronistic, "CQD" did not come into use as a nautical distress signal until around 1904 when its use was suggested by Guglielmo Marconi.