'Buy a truck, get a free AK-47' -- that's an unusual promotion launched by a used auto dealership in the US.

Nations Trucks in Florida has introduced the scheme of a complimentary Soviet-style AK-47 assault rifle with every purchase to help it through the sluggish US economic recovery, The Daily Telegraph online reported. The dealership has more than doubled sales since the offer was announced last week, according to Nick Ginetta, the general sales manager.