Newbie question SBR build

[dominicelliott]

Hello all.
I'm a newbie to the forum. I am also planning on building my first sbr.
In the process of getting my trust done.
So my question....

I was briefly overlooking the form 1 to have some understanding as to when I get around to having to complete it.
There are 2 boxes that ask "barrel length" and "overall length."
Now, I'm planning on purchasing a 9 1/2" barrel for the build.
Again this is my first time so I'm a bit confused and would appreciate some clarity on things I've read and heard.
When someone measures "overall length" is it from the tip of the barrel to the end of the stock collapsed? The collapsible stock has me confused. Do I take into account what muzzle device i'll be putting on the barrel?
ANy feedback would be appreciated.

Thanks

[BWS Arms]

I normally use the fully collapsed stock and include your muzzle device in the measurement.