its not so much the fact that the belt is interget, it will slide out and can be replaced with another belt...
There's the solution: get a better belt. Looking at that link it appears a 1.5" webbing belt would fit OK in the waistband. Something on the order of DownRange Gear's
Lightweight Utility Belt would be good.
Considering costs, you'll have to buy either a belt or a sheath. I'd get the improved belt then enjoy the improved load carrying capability and vastly improved equipment retention.