I'm gonna open a big ole can of worms but the barrels marked made in USA are not made in USA the only thing on those rifles made in USA is the stocks, they are maple and came from Michigan I used to buy seconds at the Kalamazoo gun show 25 yrs ago they had bins of them for $15 a piece. I was best friends with the fellow who built the prototype for CVA, they flew him to Spain and he took a piece of Douglas barrel along and rifled a barrel while in Spain, I still have a cross sectioned piece of that barrel. I have used these barrels to build guns around and have fixed or recrowned many of these barrels, they are way too hard to be Douglas or Sharon barrels, the lathe and cutting tool tells the tail. As far as your gun goes the washers are steel the early ones were straight knurled and pressed into the stock the later ones were larger in dia. and were just washers that could fall off if the lock screws were removed. They are good accurate guns and have an almost cult like following because of the stamp on the barrel. Sorry if I stepped on anybody's toes but I can honestly say I was there!
Regards, Steve Chapman