This sterling silver charm looks like a 6 shooter revolver in a holster from the westerns. It is 20 mm long and 18 mm wide. The back is flat (see third photo)!
Look in my ebay store for the many other sports charms also for sale! I also have volleyball, basketball, tennis, soccer, dance, cheerleading, swimming, ballet, tap, skating, skiing, water polo, wrestling, football, karate, hockey, lacrosse, golf, running, bowling, skating boarding and others I can't think of right now.