I am interested in two stocks available for the M1A, but do not know what they are called, who makes them, or where to buy.
The first is the stock that accepts AR15 collapsible stocks.
The second is the stock that looks like a standard M1A stock, but has the adjustable cheek piece.
I believe it was Tony Lawerence of Law483 stocks that made some with the M4 tele stock.
As for the adjustable cheek pieces they are more than likely an aftermarket part mounted to a USGI synthetic stock.
Or McMillan makes an adjustable cheek piece stock for the M14/M1a and SA has a Walnut stock with the top of the comb adjustable.
This is the one I am planning on for my NM M1A when I get the time..
I also have seen kits do make your own stock into an adjustable cheekpiece stock.