black gun
n.— «Ralph Langevin, the gun backer of Story’s Sports Shop in Laconia, said as the election gets closer and closer he has seen a real hike in sales of assault-style weapons—or “black guns” as they are called in the retail community.» —“For some, gun rights remain a big issue” by Cutter Mitchell The Citizen (Laconia, New Hampshire) July 7, 2008. (source: Double-Tongued Dictionary)