It's Always Sunny in Philadelphia (2005) - 1x05 - Gun Fever

Dennis and Mac decide to purchase a gun after the bar’s safe is stolen. Believing that the police isn’t doing anything to solve the crime, the two set out with their new firearm to capture the thief. Behind on the rent payment, Charlie receives a visit from his enraged landlord. Even though she doesn’t like guns, Dee feigns an interest in them to impress her new boyfriend, Colin.

Buy this episode at