Ya, should fit if the barrel flats are the same size. they made 15/16 and 1" sizes.
I'll bet ya the nipple threads are buggerd or stripped in that perc barrel..you can get an aftermarket breech plug but it can be a dickens to turn the factory one loose without the proper tools. Too bad the previous owner didn't take advantage of the "lifetime" guarantee. Or if it was a "kit" gun it isn't coverd under warrenty. A kit guns barrel has a "k" prefix to the SN#. There is actually a K embossed in the stock of a kit in 2 places, one in the lock mortis and another on the bottom of the barrel channel near the tang.