Did your homeowner insurance company require make, model, caliber, serial number & barrel length for each one of your firearms? Mine did and I told them to get lost.
My gun insurance consists of safe, deadbolts, alarms, and that the number of people who know can be counted on one hand.
No. Instead, I have a liability umbrella and a total contents value. The proof of my weapons and all my belongings from clothes to furniture to weapons and pets is on a video tape which gets updated every two years (or with large new purchases). The video tape is in the safety deposit box.
If there is ever a loss, I have the video to prove the contents that are insured. I recommend this to everyone.