Anybody been watching these Carbine items?

[USGI]

I believe-

IP had the complete circle tooling hole. And started out making the Type II housings that still had the Narrow rear magwall, like the Type I housings others had previously made.

S'G' transitioned to the Dimpled tooling hole..... the later style hole (but not the last style which was no hole or just a Dimple and No hole).

Charlie, I wish I'd been more careful with my first post in this thread so it wouldn't have been moved - should have just posted the picture of the TH and not the link. I think you did an excellent job "summing up" the Grand Rapids trigger housings in your last post, and that's not an easy thing to do - that's why I had decided earlier to give up on it. After letting it rest for about a week, I took another look this evening, and have a couple of questions on your comments quoted above:

1. If I'm reading the WB books correctly, the changes and additions listed in WB III suggest that IP did make what we commonly call Type 1 TH's. On page 1102, the Type A Variation 1 housing is defined as being "Incorporated Dec.19, 1941 with milled angles on rear lug and between front lugs." On that page, it also asks that we change the Type A Variation 2 definition to "2a", and add: with milled angles on rear lug and between front lugs, "2b" with angles on rear lugs only, "2c" without milled angles on rear lug or between front lugs. These changes are to be made to page 304 of WB 1. The WB 1 "errata sheet" also mentions these changes and some of the ones I'll list in the following paragraphs.

Then in the Irwin Pedersen section on Page 1178 of WB III, it gives additions to be made to WB 1 page 420, 1st Housing, Trigger, Type A Variation 2 (milled; near magazine well wall, milled both sides). Add: Variation 1 (with locator hole at rear) a IP. Then also on page 420, 2nd Housing, Trigger, Type A, Variation 2, Add: Variation 1, b S'G'.

I'm starting to see what WB III is trying to get across here and up to this point I thought it was having us add a Variation 1 TH (Type 1) for Irwin Petersen carbines. I said earlier, I didn't want to give up yet, but now see it only wants us to add a Variation 1a and a Variation 1b to the Variation 2 TH housings in order to show that they can be marked IP or SG. You guys probably already knew that! I was trying to read too much into it, I guess.

I'll mention quickly too, without trying to copy in the text, that they did the same sort of thing with the Grand Rapids section of WB III on page 1180. There it outlines changes to be made on page 426 of WB I with a Variation 2, Variation 1 for the early production with the locating hole, and then a Variation 2, Variation 2 for the later production where the hole transitioned gradually into a dimple and then disappeared. Some of this applies to Page 427 in WB 1 and to the TH's pictured on those pages. There's a "b" printed there in the text and I'm assuming (I know what that means!) that it should go with the "2" as in 2b, but not sure. I took the liberty of assuming that's what was meant for the changes to be made for the Irwin Pedersen section in the paragraph above as well.

2. Charlie, if you're still reading (kinda hope no one else is) what did you mean by (not the last style which was no hole or just a dimple and no hole? I thought your S'G' Type 3 housing was that type - with just the dimple?? Mine in that composite picture you linked to, has the dimple and a hole. - Bob