I doubt there is any real shortage in AR's, or not where I'm at, t and here all over the WEB for sale from Dealers that have them, when I last looked at thing
I imagine that what all that is going on with riots and such, are making a LOT more sales of ALL types of guns,sales.
But I don';t think any one model gun is being bought up and low in production.
I would think most makers are making as many as they can to capitalizes on the profits they can make now with demand and sales being what they are!