[RetiredArmy]

Really nothing wrong with that pose. In ranks inspection of arms often requires the inspector to look down the barrel to check too see if it is clean. But, he only does this after the person holding the weapon has performed a clearing of the weapon. Normally the inspector takes the weapon in hand and double checks the weapon to see if it is cleared at the bolt before he starts looking down barrels etc.

[Starstruck]

I think the guy holding the rifle is using his thumbnail to reflect light up the barrel. That was how we did it when checking for dirt.

[Seven plus One]

There is plenty wrong with that 'pose'. There's a magazine in the weapon, presumably loaded. Who has control of the weapon? NOT the inspector. OK in Swaziland maybe, but not at my range, or with any military establishment in this hemisphere, that I know of. The balance of yer post contradicts the first sentence.
Sorry for being a dick, but I am convinced that there is no such thing as an accident with a firearm. Always was, always will be. It's a principle with me. Negligence, whether personal or institutional is not an excuse, it's an indictment.