Originally Posted by Jack_Bauer24
Don't think you'll be able to purchase NFA items until your 21 my friend. Your barrel should already be threaded with a flash hider.
Like a pistol: 21 to buy from an FFL, 18 to buy or to make yourself. SO, you CAN own them, just can't buy them from an FFL.
If you create an LLC, or Revocable Living Trust, and have a partner or co-trustee who is 21 or older, they can pick up the item on a 4473 when the Transfer Stamp to the LLC/Trust comes back. Then you (as an 18-21 year old) can then take possession of the item.