For a C&R licensee? If so, have your C&R record ready for review. Have the C&R firearms you purchased available for visual looksee, meaning, out of the safe and away from all other firearms. Make sure they're unloaded. Don't have ammo laying around. They are there to inspect your C&R collection (meaning the C&R weapons you have purchased with your C&R license) and nothing else. If you've sold one or two, have the record available. Be pleasant, they will do their job and thank you when they leave.
Also, hide your seditious literature. Roll your sleeves down and cover the skinhead tattoos. Put granddad's Tommy gun under the bed. Put the bong in the dog food bag and turn the picture of Charles Manson to the wall.