Please tell me the procedure
I want to add a side folding stock and possibly a foregrip to my MPA30T. I know where to buy the stock and that I need to get a "tax stamp" for it because it will be considered a SBR. How do I go about getting the forms a d paying the required fees? I would imagine one should do the paperwork and pay the tax fees before buying the stock, correct? Would it make any difference of I added the foregrip later than the stock? Thank you.
Sic Semper Tyrannis