Carlson's choke tubes says the Rossi 410 Turkey "Interchanges with Carlson's Beretta/Benelli Mobil style threads."

follow up Please do not shoot without a choke installed From the rossi 410 turkey owners manual page 20 Never fire the shotgun without a choke a choke tube properly installed. Failure to do so will damage the precision threads on the inside of the inside of the barrel. Firing the shotgun with loose choke tubes may lead to damage to the choke tube and barrel, as well as serious personal injury to you or those around you.

1st do not shoot it without a choke it can damage the threads and with no choke installed the end of the barrel is very thin and subject to damage get the proper choke tube it uses the Beretta/Benelli Mobil style chokes can be purchased here choketube.com/choke-tube-product-details-R.php?Benelli-Mobil-Choke-Tubes&gauge=410&mf=3

Gary, Just remove any existing choke and you will have a cylinder bore to handle any 410 slugs.

Gary, the Rossie 410 Turkey comes with an X-Full Choke. Simply removing the choke would give you the right bore to fire slugs.