CCanevit,
In the first half of the 20th century, many gun manufacturers made available popular rifles and shotguns that could be "taken down" to make for easier storeage or shipping.
In a take-down model, the barrel is easily detached from the receiver or action and buttstock.
Usually, this involved some sort of interrupted-thread on the receiver/barrel breech joint, and required special machining.
Your Winchester Ranger is not a takedown model, of course, but the guys were talking about how to CONVERT a standard Winchester M1894 into a takedown model by machining a takedown mechanism.
HTH
John