Gun

A gun is a weapon used by humans, but Smurfs are also seen wielding them in certain fanon works. They are believed to have existed as early as the 14th century in China, while Gunpowder is actually traced back to the 9th century. At this time, the gun was referred to as the Fire Lance, which really was an early musket.

In mainstream Smurfs media, Lord Balthazar had used a musket in an attempt to kill the Smurfs in The Smurfs Springtime Special.

Empath: The Luckiest Smurf stories
In the EMPATH: The Luckiest Smurf story series, Wooly Smurf is known for having a pellet firing pistol in his possession.

Glovey stories
In the Smurf Me Up series Hamelin McCreep was known for having created a modern rifle and a pistol, which he built from Chinese blueprints.

Smurfs Abound series
In the Smurfs Abound series, Cowboy Smurf is a Smurf who is seen holding two pistols.