epoxy in tapped receiver?

[ssgross]

EDIT: WARNING - the pictures below are so sad, it has hurt some members' eyes to look at them.
Saw this sad bubba for sale. Is that jb weld or some other epoxy in the holes? JB's website says only way to remove it is to heat to above 600F melting point, or drill/grind it out.
The holes in the rear look to have welds in them?

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