I'm apparently in a deadzone of places where I can order the LW-15 lower receiver that I want (or any lower receiver, for that matter). However, I'm RIGHT next to a gander mountain (regular, not specialty gun shop) both at home and at work. They don't have anything worth looking at in their AR-15 section (nothing but carbine length forends, can't stand anything shorter than mid-length), but they DO have that Sig AR-15 'pistol' with the 'brace'. Have to say, that thing is actually comfy and handy as heck, even if it's basically impossible to use the brace with it as a pistol (can't get the sights to line up without a LOT of work).
Stupid SBR laws.