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I am thinking Monson to Norwich to CZ may have changed the Opening on the vents. Monson would be double line cal and place of manufature, palmer roll stamp one line cal only, norwich not sure, cz laser etched. Side by side comparason or just bag up the darn strange shrounds and send them over here!
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I suspect that as tooling wears out or needs adjusting things get changed. The vents are only cosmetic anyway, arn't they? They are supposed to help cooling I guess but really how much difference does in make in all but a few high round count competitions.
LB
Wisdom is merely the realization of how little one knows, therefore I am wise.
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