Gee Bob,
I've been flipping pages to help but now your SA information blows that boat out of the water...
I'll go ahead and submit this,,,, maybe it will help someone.
At about 6 million Inland and WRA went to a long barrel channel stock. Looked exactly like a Type III lo-wood just having the extra (4.15") channel verses the original 3.15" long channel. I can't say that Inland had it, but WRA added the Recoil plate support/under cut at this time. These I call the Type IV.... long barrel channel, NO M2 cuts of any type.
I have an original WRA 5,811,227 that records show had the serial number stamped on Oct 10- 1944. No way to know when it was accepted, but it has a WRA Type IV stock with long barrel channel, Recoil Plate support cut and no M2 modifications.
When I've handled these Type IV stocks feel thicker on the forearm, though not really visible.
Then as M2 stocks were needed (Ordnance considered them Critical at the time). As needed, Any previous stock could/would be modified to accept the internal M2 parts.
M2 stocks: As they became available, There were 2 versions of these made.... 1 having more of a pronounced 'Potbelly' than the other.
Recoil Plate Support Ledge:
M2 Stocks:
This picture has a early style on top. M marked slingwell. Flat bottom profile common to this particular maker.
2nd style below, showing a more pronounced bottom profile, a HI stock.
War Baby page 352:
Safety, Type B (T1 Rotary)
E.I. or H.I.
Late 44 to End of Production.
Is S S Seymour Smith?
If so they were a supplier to Inland. I'm just not sure if they supplied Inland with Rotary Safeties. Inland did have Safeties integrated from other makers.
Maybe receiving some S&S Safeties from another Prime maker ????
Being this late in production.. I'd think everyone was ready to empty their shelves.
Cheers Buddy
Charlie-Painter777