Upon arrival into the United States you will go through passport control then proceed on to collect your bags and firearms for customs inspection. You re-check your bags with your airline for your next flight and the Transportation Security Administration (TSA) official will check your firearm, then escort it to your plane. TSA regulations require that firearms must be transported unloaded in a hard-sided, locked case, and ammunition must be checked in a separate bag. Certain airlines may have additional restrictions.