Plot: The Pawn Stars prepare to charge when a man brings in a Civil War musket once carried by an ancestor wounded in battle. Complete with rare documentation, will the guys execute a brilliant battle plan for this firearm or will the customer secede from the shop? Then, Rick blows a gasket when his son Corey sells an extremely rare movie poster from his personal collection - can Corey make it up to him, or will this movie memorabilia mess-up bomb? And later, a rusted-out 1950s atomic missile-themed pedal car squeaks its way into the shop