Who is the M1 Carbine Guru?
I've been reseraching small parts use in my five resource books. In some there is no mention, others mention but no dates, and still other have conflicting info. For example, when was the transition from high wood to low wood on the M1A1 Carbine stocks?
The most knowledgable person on these boards
would be Brian Quick. There are a few others but none at his level. Hanging around these carbine boards you will find a lot of incorrect opinions, but I have to say that there are fewer than before. The majority of incorrect answers are the result of putting too much faith in poorly researched books. Common sense also helps, as an example: flatly stating that a particular parts was used inside a defined time period. The mechanics of supply will tell you that parts, especially new design, come in at a few at a time and become more common with the passage of time. The flip/adjustable sight at Winchester being a great example.