It took a year for the COVID supply chain issues to start to affect us, but sadly it's happened in a big way recently. There is little to no Delrin AF that meets our needs available from reliable manufacturers/countries. I'm working to buy up everything I can when it becomes available, but until further notice, all Delrin AF kits will be built to order. This way, we can save what material we get out hands on for whoever actually places an order and we can better ensure that customers will get the version of the kit they want.
If your specific order will take longer than the standard two-week lead time, we will contact you after the order to let you know. You can also reach out through the Contact Us page of the site to check before ordering or email us directly at firstname.lastname@example.org.
Currently, this does NOT affect the standard Delrin, but that may change over time. I appreciate everyone's patience with these issues.