I can't remember what exactly they are called or how to explain them, but in basic training my TI had these menacing pieces of metal installed on his boots and they made an unmistakable metallic click and they faintly rang with each step on the hard floor in the barracks. It's not exactly "Spurs" but mixed with a couple jingle bells in the shin tools I'm thinking it might sound equally terrifying on Fett boots. I could be wrong it might have just been the setting, but I might explore that avenue and see if that sounds right.
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