It depends? I’ve honestly never heard of a firearm being irreparably broken- there’s not usually a ton of different parts involved like with a car so repairs are drastically similar.

The amount of use and abuse a gun would need to be broken in some kind of semi-permanent way would be a lot. Generally if you’ve got the money for that amount of ammo, you’re going to have the money to have your gun- which you clearly like- repaired.

If you really just want to get rid of it, though, from my understanding you can take it to any police station (probably call ahead showing up with a gun randomly is a bad idea) and they’ll dispose of it for you.

If you’re asking about the mechanics of it, all you need to legally ‘destroy’ a firearm is an oxy/acetylene torch. The ATF has a nice little guide.

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