I sent the OP a pm on this last night & I too referred to it as constructive intent. I guess somewhere along the way that's how I heard it. So. I too am guilty of perpetuating an incorrect term. Semantics yes, but It'd definately be easier to find info on the subject when using the correct term. I'm not a tinfoil'r but I think it could be dangerous for a person to post about the cool shorty upper they just got & then ask how to get a SBR. That's why I sent him the info in a PM, I didn't want to draw alot of attention to it. This actually happens pretty often.