I am a movie director and I just received the following movie plot. Could you help me answer this question? If not, let me know by writing "Not answerable". Plot title: The Mexican Movie plot: The story follows Jerry Welbach (Brad Pitt) as he travels through Mexico to find a valuable antique gun, The Mexican, and smuggle it into the United States. Five years earlier, Welbach had caused a traffic accident in which he hit the car of local mobster Arnold Margolese (Gene Hackman), who was jailed for five years after the police searched his car following the crash, finding someone tied up in his trunk. In compensation for the jail time, Welbach has been sent on various errands by Margolese's prickly second-in-command, Bernie Nayman (Bob Balaban). Retrieving the gun will be his final errand. Welbach has a girlfriend, Samantha (Julia Roberts), with whom he argues constantly and who leaves Jerry prior to the trip over his lack of commitment to their relationship. Jerry arrives in Mexico and makes his way to pick up Beck (David Krumholtz), the Margolese employee now in possession of the gun. There, a drunken Beck tells Jerry about the gun's history as a suicide weapon used as part of a jilted love-triangle between a woman, a nobleman, and the son of the gunsmith who forged the weapon, as well as its curse to misfire. Jerry helps Beck to his car, only for the man to be killed by celebratory gunfire from a nearby festival. Panicked but determined, Jerry buries the body and then calls Bernie to report on the situation, only for his vehicle to be stolen while he makes the call, the gun still inside. Jerry briefly has an uncooperative donkey as transportation to follow the thief, then buys an old, damaged truck. Meanwhile, Samantha gets kidnapped by a hit man named Leroy (James Gandolfini), who tells her that Jerry hired him to make sure she is safe from anybody that wants her dead. It is then revealed that Leroy is gay, which doesn't bother Samantha. They pick up a postal worker named Frank (Michael Cerveris), who then has a relationship with Leroy. Another hitman follows them to Las Vegas and kills Frank to make it look like a suicide. Leroy kills him in an act of vengeance, and flees with Samantha. Jerry... My question: Welbach goes to Mexico find what?
Answer:
an antique gun