In general terms:
Given the fact there are kits to convert Glock receivers into SBR weapons as long as you have the tax stamp for an SBR...
http://www.hera-arms.com/gcc.php
Could I obtain a SRH and an SBR tax stamp and convert it into an SBR? Is the order of operations:
1. Get the SRH and leave it as a handgun,
2. Get the tax stamp,
3. Put a stock on it?
I'm really digging the idea of a DA revolving rifle. I might not even SBR it and put a real 16" barrel on it instead, so I can hunt with it... I don't think I'm allowed to hunt with an SBR in AZ. Depends on if I decide to do the .44/.308 sabot suppressed thing or just leave it as a .44 or .454.