From: "Tony Ingenoso" 

1) There is a maintenance cap for the guns. 2) "moving parts" use
seals and boots just like on your car to keep crap out.

Does your car self destruct after being run through a mud puddle?  That
would be quite annoying if it does.

"Robert Comer"  wrote in message
news:42dcde5c$1{at}w3.nls.net...
> > If modern tanks can be sealed against NBC agents, I should think
ordinary
> > sand is not much of a challenge.
>
> The inside is sealed, not the outside moving parts, engine and guns.
>
> - Bob Comer

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