No barrel nut - Aero Precision AR15 Gen 2 Enhanced M-LOK Handguard

I like the Handguard. However, it does not come with a barrel nut and it needs a specific BAR barrel nut for it to fit correctly. I would be fine with just ordering the barrel nut separarely, but the problem is that it is out of stock EVERYWHERE. So basically this handguard is useless.