Yup! This make this costume way more awesome!! It's a killer mix, 'cause there is nothing more futuristic than transformers and there is nothing more traditional than the Spanish Civil Guard.

Although the moustache thing is quite common among the members of the "benemérita" (nickname for the spanish Civil Guard), I would say that this guy's costume is inspired by Tejero, one of the most famous members of the civil guard after leading the coup d'état in 1981, when he got into the parliament and shot his gun while saying "se sienten coño!!" -> "sit the fuck down!!".