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Well it looks like camo to me.

I can see a gas port at the from end of the fore end which indicates a semi.

There is a black tube sticking out in front of the fore end which looks awfully like...

That's a questionable assumption. I would pick that if it was a novice they would be supplied with an U/O. In the photo it is a camo semi with a mag extension so more likely to be the users own gear,...