first would it be possible to use a A2 buffer tube , spring and buffer if I permanently plugged the screw hole so you could no longer attach a stock to it?
Where is a good place for complete uppers and does 7.5 or 10 inch have any impact on reliability
ETA sorry I thought I had been in the pistol section mods please move.
You can use a rifle extension, but you have to find a way to retain the takedown pin.
Preventing rotation of the tube is a good idea too.
Several companies make a “gusset” that performs both functions.
Plugging the screw hole isn’t really required, but cheap insurance.
Any particular reason for considering the A2?
I would switch the takedown pin to a push button release pin, both actually… You actually don’t need the springs or pins once their installed.
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Thanks for the information I had not thought about that. I am just going to get a pistol buffer assembly and go from there.