I was considering buying either an 11.5" or 10.5" barrel and building another AR but after reading a little on the net It says thats considered A SBR? Is this correct? If so how does a draco not fit in that catagory? Is it because It doesnt have a buttstock? I am new to this class 3 stuff, I was just seeing pictures of BCM 10.5" uppers and was wanting to get one and build me a spikes lower until I read a little into it, and now I'm just confused because it seems like a stupid law that you have to have a 16" barrel