FYI be sure to look very closely at how much they will cover each firearm. for example, a $50k policy may only cover $400 per firearm, so if you have a $2000 rifle stolen you are getting max $400.
Most policies I have seen require anything over $X value to be scheduled, meaning it either needs to be appraised or have proof of purchase. However if you add enough scheduled items to the policy, expect the premium to increase.
the NRA sponsored insurance is a good example of crap....basically they advertise something like $40,000 policy but if you look closely it's only useful if you own a safe full of hi-points and ravens.