Definition of "single-barreled" []

• Having one barrel (adjective)

WordNet. Princeton University. 2010.

• "Jointly staged by Aaron Posner, the company's artistic director, and Teller, the magician with the single-barreled name who lets his partner, Penn Jillette, do the talking, Two River's "Macbeth" is a spook show that sheds almost as much blood as Tim Burton's "Sweeney Todd," and does so with equally thrilling results."
• "It was single-barreled with a polished wooden butt."
• "He had shot himself from a small, single-barreled pistol which was lying beside him."