To be fair, he'll spend a lot more than 5 minutes to process your transfer. He'll have to receive your shipment, unpack it, and log the gun into his A&D book. He'll have to notify you that your gun is in, and when you show up, give up a 4473 to fill out. He'll check it over, and either call in your NICS check or type your info into NICS eCheck, and then wait for a result. If it's a delay, he'll have to wait longer. If he gets a proceed, then he'll have to complete the 4473, give you your gun, and finally log the gun out of his A&D book.
That takes more than 5 minutes. Trust me.