Remington 12ga magazine tube coupling for Remington LE Extension
This part gets buggered up often because of the tendency to over tighten if. When installing this part simply hand snug it down until you no longer hear the clicking sound of the detent plunger, then stop, the detent plunger will hold it in place. So, if you have Put a wrench to yours and it is FUBAR spend the $16.50 and pay your stupid tax ( I have paidmany such taxes over the years). This part retails from Remington for $17.47 on the 2017 parts list so Don't Use a wrench on it.