A D in a circle indicates a different method of machining the breeching up thread to prevent wastage of barrels
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A D in a circle indicates a different method of machining the breeching up thread to prevent wastage of barrels
I have no circle, just a capital D on the flat.
https://www.milsurps.com/images/imported/deleted.gif
I also have this on the bolt:
https://www.milsurps.com/images/imported/deleted.gif
OK, I get what the D means now. I didn't at first understand what was meant.
This is my first NO4 MKI*.