Re: what is the correct sling used on the early m4
Well I just hung up from talking to my M1/M14 guru. According to him, all of the following slings would have been available to the GI when the M40 started being used:
- brass frogged M1907
- steel frogged M1907
- brass hardware cotton web
- steel hardware cotton web
- steel hardware nylon web
The brass hardware M1907 and web are the least likely slings that would have been used, though they were in the system at the time.
I would be inclined to outfit it with a steel hardware M1907 (non-MRT) or a steel hardware nylon web sling if it were my rifle. I have yet to document an MRT (Mildew Resistant Treatment) M1907 sling, commonly associated with the M40A1, with a date prior to 1980, so it is safe to assume the MRT variant was not in use in the 60s when the original M40 came out.
I sold my USMC sniper book that was from the M40 era, but if memory serves me well the illustrations in the book showed the M1907 sling.
Does anyone else have intel on when the MRT M1907 became available? Here is an interesting clue that MRT was available in the 50s for cotton web slings.