The thing to remember about the new stainless steel parts is that they are cast rather than machined. It costs less but some shapes cannot be cast in a mold very readily.
What looks like knurling on the toggle nobs is actually indents into the nob rather than raised points.
I suppose that things like that are the tradeoffs to get a gun that costs around $700-$800 rather than $15,000.
One other thing is that the grip is larger on the stainless guns. My artillery measures 1.75" front to back just above the stock lug and the stainless is 1.85". Not much, but definately enough to feel!
I am no foundry person but one could probably compare the two and explain why most of the changes were made due to casting considerations.
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