[SlowBoat407]

Okay, I can't see where there's a magazine where it should be. Still, why would a smoke puff and spent casing be photoshopped in, but no mag? Are there shorter magazines?

[CholeraJoe]

Are there shorter magazines?

There's a 20 rounder but it still projects downward. My M-14 has a 5-rounder but I've never seen one for the M-16 series.

[JamesP81]

Still, why would a smoke puff and spent casing be photoshopped in, but no mag?

I don't know, but I'm also pretty sure the case is photoshopped. M4s tend to eject cartridges backwards past the shooter. This one, however, appears to be either even with or even a little in front of the ejection port.

As to why they'd photoshop it, maybe they are learning newer and better tricks. I don't know.