Firearms Insurance

Does anyone have insurance for your firearms? If so, is it a separate specialized policy or is it something like an add on with homeowners/renters insurance?

This is something I have been thinking about since I bought my house back in Oct last year. I know the NRA offers some as member benefits, but I looking for something maybe along the lines of total coverage/full loss/theft/damaged beyond use replacement coverage.

Thanks for any opinions and info about this issue.