I suspect you have never been a grunt. That’s clearly in a classroom or cleaning room, and his rifle is fieldstripped.
Looking down the bore of a stripped rifle during cleaning sessions is pretty normal... but you wouldn’t know that, would you?
What's so stupid about seeing if your bore is clean? You just leave yours filthy or what?
Nothing is much better than an idiot posting a picture he thinks make someone else look like an stupid only to have their own stupidity proved beyond all doubt. Snickering Dolt would be a better handle for ya'.
How long have you been a photo analyst for the CIA ?