At What SN Were Late Inlands Ready for the M2 Parts?

[southfork]

I've often wondered when the late Inland carbines were manufactured with the slide, hammer, trigger, etc. that were compatible with military field conversion to full auto by the addition of M2 parts? Was it after SN 7 million? Or did it happen in the 6 million to 7 million range? Also what was the slide and hammer type when it was compatible? Lastly, do Inlands that have those later M1 parts bring a premium on the market? Reason I ask is I have a 6.4 million Inland, that I may sell or trade for an early carbine.

Information

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[Bruce McAskill]

The earliest known serial number was on one of 3000 preproduction model M2 carbines with the number in the 6.78 million range. But the first testing of the production M2 carbines was in the 6.92 million range. The M2 carbine had parts that the M1 carbines did not have. The hammer and the slide were different and had the added M2 parts. An M2 hammer does not work in an M1 without adding some parts to it. An M2 slide does work fine in the M1. Inland made both the M1 and M2 at the same time till the end of the war except for April 1945 when all production was M2.

[southfork]

Thanks for the info, Bruce.