Inland 3 million range I think. The cool thing about carbines is that because there was a bit of "legitimate" parts "mixing" by the original manufacturers, you aren't limited to an Inland receiver to "restore" your Inland barrel. I have a Quality Hardware carbine with a correct 3/44-dated Inland barrel (QHMC didn't make their own barrels). Other carbine makers also used Inland barrels. You have many options to restore your barrel.