I'm having my SBR built on a Colt LE6920 (MK18) with a suppressor. Heres my question Can I have the Colt converted into a FA rifle? If so what needs to be done? If not, why? I know I have to do a tax stamp for the SBR and the suppressor however, do I need to do one for FA or can that be included in the building of the SBR? I appreciate your help and advice.