You can own firearms in Mexico but you need a permit. You also need a permit to transport a firearm. There are restrictions of the type of firearm. SEDENA (Secretaría de la Defensa Nacional) is the agency responsible for issuing permits.I was under the impression that it was illegal for Americans to posses a firearm in Mexico even if you have TR/PR status. With that said, I just had two conversations where I was told I was incorrect. Basically both said you cannot own a gun that use certain types of ammo (the types of ammo military or police own). Can anyone point me to a source on-line or now if this is accurate? Thank you!