The PDT after the model number of MM3080 stands for Ported Drilled and Tapped. If it were Drilled and Tapped and not ported, you would just see the D & T after the model number. If the gun were a 6 inch gun, the model number is 3060 and the 4" 3040 ect. Sounds like your gun was ported after it left the factory.


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