pistol over 26" OAL w/ vertical grip/forearm 100% legal. If it is under 26" w/ vertical grip, AOW NFA (unregistered = 10yr/$250K)
Just ordered all my parts today for my cheater SBR. The Sig stocks are still out there but not AS available as a week or so ago. Went with the KAK pistol buffer tube. They now sell a spacer kit for $12 that allows you to fine tune the length of pull. COME ON UPS GUY!