You can buy a 8" rifled inserts in different calibers like other single shots. My friend says he has one in 22. mag and 45. acp. According to him they are very accurate. I am going to try a few out, not sure what caliber yet. Also will get a 20ga adapter as well.When Midland started selling their single shot shotgun (which is made by Kahn in Turkey) they also announced plans to soon sell rifle and pistol caliber barrels. It has been two years and no news about other calibers.
You can buy a 8" rifled inserts in different calibers like other single shots. My friend says he has one in 22. mag and 45. acp. According to him they are very accurate. I am going to try a few out, not sure what caliber yet. Also will get a 20ga adapter as well.