So...yeah...exactly what the rest of this thread has said. Permanently fix the plug into your extension and you're good to go.
I had a Benelli 121-M1 with the factory 8 round magazine that was pinned through the drain hole. That pin had been in there since the 90's and didn't show any sign of falling out.
Read it again
If the plug is not made of the same material as the mag tube = no go for firearms act
OP asked about wood plug and many are suggesting plastic and spent cases etc
Shawn




















































