AR gas rings are stamp cut, with tops being rounded edges, and bottoms being sharp edges.
The very top right ring has it round side up, while the bottom left ring has it flat side up isntead.
When you install gas rings, want the sharp edges of gas rings to be towards the tail of the bolt, so they seal off better during the gas pulse that is pushing the carrier back.
So check which way you have the gas rings installed on the bolt, and if the sharp edge are not towards the tail side, correct that, and do the bolt test again.
If still loose with bolt not holding up under its own weight, then need to know the ID of the carrier gas channel, as well as the OD of the ring channel groove of where the rings fit on the bolt when you have the rings off.