Replacing drywall gun bit tip holder

[bnem]

I was wondering if anyone knows how to remove the bit tip holder from a Dewalt drywall gun. Mine is currently damaged and I'd like to know how to replace it.

I want to remove this,

from this,

 

[frankush]

Unscrew the adjustable nose piece then pull the bit holder out.

 

[metaleltr]

I don't think it is that simple, isn't the clutch assembly integrated into that "bit holder"?

And my research shows it isn't. The setscrew number 42-circled in red- will have to be removed.