'This is based on what?"
Simple, the CMP is a gov't program and can be ended at any time by E.O. or Congress. This administration will not allow CMP stocks to be stored away for the future, they would simply call it a cost-cutting move to lower the deficit and be done with it. Don't waste too much time getting what you can from the CMP, I don't think it will survive this administration.
For that matter, don't expect imports of milsurps to continue much longer, either. This administration is serious about getting rid of 'the gun culture' and is quite capable of taking such steps.