I suggest that you click the notify me button on all the ones you are interested in and Buds will email you when they are available this in no way obligates you to purchase the gun. It just notifies you that they are available again

it could be one of many thing including out of production, very popular, factory waiting to make a run of that model, limited production

For all the reasons mentioned Edsel. Very popular, limited production etc. Sometimes others are just a little quicker on the draw. If it is on your wish list, create an email to text to your phone so you are alerted immediately for a better chance of acquiring an item. cnet.com/how-to/auto-forward-important-email-to-your-phone-as-a-text-message/

no item selected it could be one of many thing including out of production, very popular, factory waiting to make a run of that model, limited production,