You are aware that the gun(s) in the image are BB guns, not actual live-firing devices. The magazines are out, and barrels cleared prior to entering the 'safe zone'.
Compton did a great job of summing it up.
Like Compton also mentioned, all weapons should always be treated as if they are loaded even if you inspected and cleared it yourself, this is to maintain a habit of weapon safety.
I'll add that with real firearms, trigger disciple and muzzle control are paramount. It endangers peoples lives when someone sweeps the muzzle at people or when someone casually keeps their finger on the trigger. Also, seeing as you like airsoft and militaria so much, trigger discipline demonstrates a level on competency and proficiency.
I mentioned the basics of gun safety earlier but I'll pass along some tricks to help you pretend to be more competent.
-The way I was taught was to imagine a laser coming out of the muzzle of the firearm and not letting it touch or aim at anything you don't want destroyed. This includes the standard rule of "don't point your gun at anything you don't want destroyed."
-When picking up a firearm with your firing hand either grab it entirely by the grip (trigger finger outside and below the trigger guard) or place your trigger finger along the frame and your other fingers on the grip. (Most people seem to instinctively grab a gun by placing their finger inside the trigger guard.)
-Whenever handed or picking up a firearm visually and physically check to make sure it is either loaded or unloaded but always treat it as if it was loaded.
-Don't get lazy when it comes to safety.
For reading all that, I'll show you a potato pic of my latest purchase of a GSG-522 (mock suppressor/barrel shroud, lame CA legal 10 round magazine, collapsible stock, and HK rear sight)