Can you cut and dry the planks to use them for design/decoration in your home build? Or make a mantel out of some of it? Or decorative beams or trim work? Stairs? Porch railing? Just a thought as it is free wood for you use
Now that they are registered can you put a real stock on them? Or is it brace only cause it was free?
If you can I would put a real stock on and enjoy at least until the rulings are complete. Then decide if you want to destroy the stocks and sell as pistols