Thanks! I guess the reason I wasn't "going along" with that idea is that I've not seen much evidence of that with Inlands that I've owned, or in data from Carbine related websites. I have most of the books, but even those are 10 or more years old now - I never did have the CC Club newsletters, though. Dan Pinto (and Bill Moore ) wrote a good article in 2019 on some Inland "oddities" that's available over on the CC Club Forum.
Inland Mis-stamped Serial Numbers - The Carbine Collector's Club
I've always had the idea that Inland was turning out Carbines at such a rate in those days that barrels were being used nearly as fast as they were being produced. I sure wish I had started this hobby when I was young enough to remember more details! That carbine looks really nice - just noticed what appears to be a Type 5 slide on it, too. Now, I can't wait for more pictures. - Bob