There’s no substitute for common sense, and common sense is the driving force behind a truck gun. Ideally, your truck gun would be a duplicate of your carry gun. RugerWhat kind of truck gun is right if you know you might need a gun but aren’t sure what you might need it for? It fits under the back truck seat and will secure just about any long gun while providing ease of access. If heaven forbid you don’t own a truck, Truck Vaultalso has a full line of security vaults for SUVs, vans, and even sedans.