To use a weapon in Engpsh, you can say:

"I brandished my sword and attacked the enemy."
"She pulled out her pistol and shot the assailant."
"He wielded his bow and arrow with precision."
"They armed themselves with rifles and prepared for battle."

It's important to note that using weapons can be dangerous and should only be done in self-defense or as part of a trained and regulated activity, such as miptary or law enforcement training. It is not appropriate to use weapons to harm or threaten others without just cause.