Originally Posted by vmkeith
I'm no expert with monolithic uppers and this is my opinion: From what I've seen, a conventional free floating handguard is threaded onto the barrel nut. With the monolithic uppers, the upper receiver and the handguard/rails are machined as one piece, with it still resembling and functioning as a free floating handguard. Since everything is machined as one piece, with no additional attachment points, it makes the assembly more stable.
I understand that but 1stMarine said, "Also makes free float rails that aren't part of the reciever more stable as its basiaclly an extra attach point to the upper. Looks cooler too..."
If it's a mono upper how can the rail be seperate from the receiver? Kinda defeats the idea of mono. Correct?