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That's probably the arrow telling you it's the front of the magazine.I saw an old Sig P226 dovetail magazine. The only marking was on the baseplate:
View attachment 308484 Anybody know what this mark is?
It is definitely not a Cadillac.Pontiac?
Direction for base plate installation.
Love those pins! They would look good on the dash of my GTO !Pontiac?
How many times do you need it answered? Four people responded that it was a directional symbol.Bottom line: nobody knows this manufacturer mark?