Stock question

I have a eTiny mosfet fitted and want to replace the standard stock with a smaller one.

Am I correct in saying that the stock tube is commerical size, and most other airsoft stock won't fit?

From what i've found out on here, yes, it's the commercial spec stocks that fit our stock tubes

So it isnt a Milspec tube?

Both the CTW and PTW are made as 'Military / Police Training aids', so if you want to change parts like stock tubes, gas blocks etc they MUST ne for the real steal sized versions.

Airsoft weapons as a rule are slightly smaller / use different threads on there parts as they are cheaper to manufacture.

That's what I thought.