My Form 1 is in process to SBR my Scorpion, trying to get ahead of some anticipated new gun laws coming down the chute (arm braces). Currently I have the Gear Head Works Tailhook. I've looked around but can't find anything... does anyone know if there's an adjustable/collapsible stock piece that can slide into the Gear Head Works hinged stock in place of the Tailhook I have in it now?