Hey, I almost forgot about this thread!
Thanks for the responses, guys. One question. Once I have this thing built, can I put a 16 or 20" upper on it for a varmint outting, provided I have my "tax stamp" with me to prove what it is? I mean, I know you can switch uppers, but it never crossed my mind. I almost dropped the idea a day or two back because of that. But if I can build it as a 11.5 or 14.5" and then put longer barrels on it just for fun little hunting outings or something, then I'll be all set. I just don't want the 11.5 or 14.5 ir that's all I can have, because I'll lose too much velocity for long range varmint hunting. Thanks guys!