Would that be a Marksman-TAR? The barrel still looks a bit too long to me...
By the way, how would one tag the Upotte!! characters? As the weapons themselves, or with the names given in the series (Funko for FNC, Elle for L85A1, etc)? Personifications can be tricky when it comes to tagging...
I'd assume all the others can be tagged similarly, but I don't want to mess up the database any more than necessary (I've had a string of failbooru pages recently).