If the "rifle' you are referring to is the one with the powder flask hanging on it, it is a smoothbore made in the 1960s. A friend of mine had one that we shot a few times back about 1968. It was a smoothbore of about .40 caliber and my friend bought it new for about $30.00. I seem to recall that back then they were marketed as "Brazilian trade muskets". I would be careful shooting it.