Good afternoon to you!! If you live in Ky you can pick the gun up at the Lexington Bud's gun shop and range or Uncle Lee's, Bud's location in Greenville. If you don't live in Ky you can have the gun shipped to an FFL in your state. I'll attach a link you can read to explain how to order online.
budsgunshop.com/howtobuy.php

1st check your state laws some states restrict AR style firearms to 21 years old if the gun is legal in your state you would order it and select a FFL to have it shipped to. at that FFL you would (in person) do the proper paperwork and have background checks done

Hi Casey and welcome. You can pickup the AR at any Buds store location or can have Buds ship it to a local FFL in your state for you to go in, do paperwork and pick up as well. Just place the AR you want in your cart, select check out, select a Buds location you wish to pick up at or a local FFL in your state. Go to payment method, pay and Buds will email you order information. Cheers, stay safe and happy 18th!