Mostly agree Smokin' Joe.
"and thousands of rounds of live ammunition, according to prosecutors."
Could be substantial, I'd have to see it but the grenades are the big deal.
Nine firearms, two of which are handguns. Working with a pretty much standard gun cabinet in this area, the unusual thing about that is the absence of a shotgun. Three bricks of .22 for one rifle and one pistol. (1500 rounds).
I'll note that these firearms (long guns) were all described as "rifles". Anyone with an AK or SKS or AR-15 who doesn't have at least 500 rounds around for each rifle is either not a shooter and wants it to just have it, or likely just got back from the range. A 'spam can' of 7.62X39 is 440 rounds, and one per rifle in reserve is not so much, bought with the rifle. When the SKS was cheap, that was about $200, for the rifle
and the ammo. An AK 74 (5.45 X 39) uses a round more similar to the 5.56 round the AR uses, and a spam can of those is 1080 rounds. One can per rifle, and there are 'thousands' of rounds, and we haven't touched on the other handgun. You could fit the works in a footlocker, volume wise.
Ordinarily, here, there would be a couple of scoped rifles in that mix, which may be bolt actions (for hunting deer or hunting elk farther West) and a smaller caliber one for varmints, or just two deer rifles.
A couple hundred rounds for each would not be so unusual.
It may seem like a lot, but it isn't that much, really, especially if accumulated over time.
It doesn't take that much to have a few thousand rounds of ammo, especially if you have been at for a while (and especially if since when ammo was cheaper).
But aside from inert, practice, or the 'complaint department, take a number' variety, not many have any grenades.
I, personally, avoid having something that looks like something it isn't, just because of the 1971 ATF attack on Kenyon Ballew
https://en.wikipedia.org/wiki/Ken_Ballew_raid, where the justification for the raid came from a burglary suspect's tip that he had "seen grenades" in Ballew's apartment, and the ATF and Montgomery County MD police raided Ballew on the basis of that info.
That raid was the first ATF outrage I learned of. There have been many since.
Ballew was shot in the (then unusual) door busting raid, and suffered major brain damage. The "grenades" were either inert or novelties which had been rendered militarily incapable and set up to fire cap gun caps.
From the cited article,
To counter defense claims that the inert grenades were legal curios or ornaments and not live weapons, the judge cited a prior case as establishing that possession of a glass bottle, flammable liquid and cloth in the same place at the same time was constructive possession of a molotov cocktail and prosecution did not require an assembled molotov cocktail;[6] therefore, Ballew's possession of both inert grenades and of gunpowder and primers for his guns also constituted possession of live hand grenades, even without assembly of live grenades. Also by modifying three of the grenades to pop caps as noise makers, Ballew had weaponized the grenades and they were no longer inert curios or ornaments. "Although these grenades could not have been exploded as found, they could have been fully activated....
By that logic, if you have plumbing supplies, reload and have powder, and some cannon fuse laying around, you have pipe bombs. Beware that logic.
The ignorance of the 'witness' the raid was based on ultimately got Mr. Ballew shot. (Either that, or the desire to deliver a 'bigger fish' to cut a deal on a charge the suspect faced.)
My attitude, since finding out the particulars of the case, has been that there is no sense in having something that only looks like something more potent. Avoiding that ignorance and possible misunderstanding (especially in the days of Facebook and twitter) can be a life-saver.
(The exception being semi-auto rifles which are clones of their select fire capable counterparts, but those are plenty common in the US and the rule rather than the exception--the assumption is that the rifle is NOT a select fire arm.) Despite having a wry appreciation for the common novelty 'Complaint Dept. take a number' inert pineapple grenade, I won't have one in my home because some fool (literally) might get it wrong, nor do I have any of a number of other neat (but demilled) widgets around for that same reason. I'm not one to display my firearms conspicuously, anyway.
Besides, I'm a geologist and have a house full of more fundamental 'deadly weapons' (rocks).
