[Eeyore]

So I'm still assembling my KA M4. Now I have a DD lite from Socom Gear. From what I can tell the ring that holds the back part of the rail onto the receiver and also locks onto the barrel can't be screwed tightly enough to stop the barrel from being able to move. The barrel can only move about 2 or 3 degrees from 12 o clock but it does make usinf the iron sights hard. Can this be fixed while keeping my DD lite?