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4seventy:

So, you are saying there are three Ruger extractor systems:

1} M77 {push feed, which we are not discussing}
2} Early M77MKII {push feed}
3} Current M77MKII {controlled feed}

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What year is the is the break off point between MKII push feed and MKII CF?

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I do remember roughly when I first handled a MK11 77 which had a controlled feed system.
A regular hunting client brought one with him in the very early 1990's.
It was a stainless synthetic in .308 Win.
I think this would have been in 1990 to 1991.
I was already filming and producing hunting videos back then and would have the footage of that rifle.
If I can dig out the original camera tape I should be able to put a more accurate date on it.

Prior to that rifle, I had handled quite a few Mk11's in various calibers and none had been controlled feed.
The difference was in the bolt face, where the early non CRF MK11's had a "coller" protruding from the lower part of the bolt face.

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