DaemonAssassin
Why should we Free BSD?
An AOW is a concealable weapon (defined by BATF as less than 26 inches OAL) with two hand grips and no stock. If you want a stock, it's a rifle or SBR.
Have you considered going with a Sig Brace instead of a stock and an OAL greater than 26 inches so you can run a VFG and not fall into either the SBR or AOW categories?
The Sig Brace is the Sig PSB (Pistol Stabilizing Brace) I mentioned in my post.