So when did "they" switch from the aluminum  C.A.R. Stock to ...the next version?
I'm going to guess it was the N1 fiberlight ?
Then I guess my next question was how long did the aluminum see service in the US.
Thanks.
My dilemma. I picked up an "old style" CAR stock off the EE. Unknown to me it turns out
To be aluminum. (Not aColt). I don't think it's the right time frame for R6450 9mm build.  
Now I fear I'll have to build some sort of XM-whoknowswhat.....

The Air Force was still fielding the aluminum Type II (vinyl acetate coated) aluminum stocks a few years ago on their franken carbines.  in the USAF Reserve/ANG unit I was in 1979-1981, both my GAU-5/A/A (12.5 inch with moderator) and GAU-5/P (14.5 inch 1/12 with A1 flash hider) had the aluminum stocks.  The GAU-5/A/A was a factory weapon, and my GAU-5/P was an Air Force creation on a 601 lower.  I have seen recent pictures from  Afghanistan where USAF folks have flat top M4s, with Aluminum stocks.  

USAF never gets rid of anything.  We had some M2 Carbines and a green stocked 601 in the arms room.

as for the Army, I saw some pics of GW I, where Stormin' Normin's security detail had early M4s with Fiberite stocks.  First time I saw one on a Colt weapon as an FFL, was 1989/1990.

Fi - br - ite

The aluminumnum stock ran from late 1966 to around 1982'ish.

When did the 2 position stock became 4 .position to 6 positions?
A2 removable carry handle flat top A4 Carbine, 2, 4 or 6 position stocks?
Any info would be appreciated.