Surp,
Good eye, surprised you're the first to notice, but the rear volley sight arm isn't actually bent. Being identical to my example, it is actually formed with a bow in it to clear the rather bulbous, but easier to manipulate, locking catch thumbpiece (or "safety" to most of us).
This is the feature that led Paul B. to suggest that this rifle was more likely to be a concept rifle (sights and safety being the concept under consideration), than a trials rifle. As usual, Paul's assessment is probably the correct one, I believe.