If not a direct hit, more likely an extended entombment after the entrance stairwell collapses and blocks the blast door. Maybe that's the second reason missileers carried sidearms.
Even if some people know, are we sure if it was disseminated across all Classified channels up and down and then the people in charge of the lists updated them? :p
There are two bits of context you need to understand this.
First: Early nuclear missiles weren't very accurate - you don't have to be very accurate when your target is the size of Moscow. A missile silo is a much smaller target!
So AIUI missile silos were hardened to survive a nuclear bomb landing 500m away - but they wouldn't survive a direct hit.
Second: There was a theory, at one point in the cold war, that one side could launch a surprise attack that struck and disabled the other side's nuclear weapons. Or at least, disabled a large enough fraction that the counterattack was survivable.
This was seen as winning. Or as close to winning as you can get, in a nuclear war. And it was seen as relatively more ethical than targeting cities.
The jargon for this is "counterforce" or "disarming" strike [1] and it was part of the rationale for having a ridiculous number of bombs - if you have enough bombs to destroy the world 10 times over, you can destroy the world even if 90% of your bombs have been destroyed in a surprise attack.
Later in the cold war other technologies were developed - high precision guidance, submarine launched missiles, and missiles with multiple warheads. Between them they made a disarming strike seem unlikely to work. But on the other hand there are still an awful lot of missiles around and they gotta be targeted somewhere. If you'd already sent a dozen at the pentagon and a dozen at the white house, why not send some of the remainder at a few nuclear silos?
Of course, you might well say this all seems pretty unlikely. A nuclear war? In this day and age? But people who think that probably aren't in the market for a disused nuclear bunker, except as a historical curiosity.
One might be tempted to think "oh, it's concrete, I'll hose it down". But after recently reading up on it a bit, some of the missiles had extremely harmful propellants, and if that leaked (which chances are it did), that'd basically be a hazmat site.
The APU on atlas missiles used ethylene oxide to fuel the turbine, you don't need hydrazine to get toxic aerospace chemical exposure. I would also bet all the money in my pocket those structures are chock full of asbestos and lead.
Somebody on Twitter mentioned that there is likely a lot of asbestos, and other environmental issues that the buyer would be responsible for remediating. I don’t know enough to know if that’s correct or not but it seems reasonable.
It's basically dry, though god only knows what the bottom of the silo itself looks like.