I'm pretty sure this is a giant dupe.
But, how can you honestly consider keeping govt. owned machine guns?
I mean, you'd have to at bare minumum toss the barrels (if they are m4) then lowers and the FCGs. They are pretty much worthless. You can't sell them.
IMHO, you should be able to buy M16s for $900 at the hardware store, but that's a topic fr a different thread.