What do they use in guns to make them smoke after they’re fired?

What do they use in guns to make them smoke after they’re fired? Tina McGinty Sun City, Arizona Blackpowder, consisting of potassium nitrate, charcoal and sulfur, was popular before the late 19th-century introduction of smokeless powder. Just a few rounds of blackpowder would fill a barroom with smoke in no time. American soldiers fighting in Cuba during the 1898 Spanish-American War often used blackpowder; when one fired his weapon, the puff of smoke gave the Spanish snipers a good target for