Harlan, Just a suggestion, on your M1icon TSMG, if you could find a buttstock without the cross bolt in the stock, it would be better for WW2. They were all produced without the cross bolt and became upgraded later on with the cross bolt. Difficult to find but still around.

There should be some 1942 dated USMC shovel covers produced on the 1910 pattern still around ? wonder if they used the off-set hooks on the later covers ?