Looks like there's something on the other side of the helmet. It's not the correct rangefinder, but something is sticking up on the left side (right side in the pic).
I think the "Heavy Gunner" Clone just re-uses the AT-RT Driver Head:
I've been trying to figure out exactly what he is, but with the small pic it's harder to guess.
Head = AT-RT Driver
Skirt/Kama = Baccara? I think all the other skirts (#33 and Evo had holsters, this one doesn't)
Body = ?
I can't quite tell which body that is, but we know it has to most likely be a re-used one. It's definitely NOT the AT-RT Body (missing the doo-dad on the legs) and not Bacara's body since it doesn't have the right shoulders on the arms.