Which buffer tube is my RRA?

[phillywilly]

I am thinking of getting a collapsible stock for my RRA AR and decided on the Command Arms model But noticed it came in two tube sizes. Also what will i need to remove the old stock and install the new one? Thanks for any help

 

[E.Shell]

Your RRA telestock tube is the smaller version. Colts and other "mil spec" tubes are slightly larger.

 

[steampunk]

On this topic is it just the tube itself that is different sizes or is it the threads too. I guess what I'm asking is are they interchangeable if purchasing a new complete unit as far as the threads on the lower are concerned. Thanks

 

[E.Shell]

The major diameter of the two tube styles vary slightly, but the thread is the same (1-3/16"-16 TPI) for both types of telestock tubes and the A1/A2 receiver extension.

 

[steampunk]

Thanks