text: According to the ATF, it's still $200.
  
  "What is the tax on making an NFA firearm? 
  
  The tax is $200 for making any NFA firearm.
  [26 U.S.C. 5821; 27 CFR 479.61]
  
  https://www.atf.gov/firearms/qa/what-tax-making-nfa-firearm