Comment: The word didn't change meaning.

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In reply to comment: do you suppose my confusion (see in situ)

The word didn't change meaning.

Your previous understanding of it was flawed.

'Assault' does not include actual contact or injury.

'Battery' does.

Thus it is not superfluous to charge someone with 'Assault' AND 'Battery.'

In this case, the assault is considered "aggravated" because it is with a gun. This calls for a stiffer penalty.

If I throw my fist towards your face but stop short of contact, I have committed an 'assault' against your person. But if I made contact, that would be assault & 'battery.'