Skans » 23 Aug 2023, 3:19 pm » wrote: ↑ Technically, civillians can't own M4's. They were manufactured after 1986. So, you could take an old M16 registered receiver and put an M4 barreled upper receiver on it. It would look like an M4, but it will always be an M16 - because that's the way its identified in the NFA registry.