The screens they are showing in that linked article, to get to them you had to press Y for Details to get to that screen. Before you hit Y for details, the previous screen shows that scout rifle with it’s stats and shows it as a level 19 gun. The sidearm and pulse rifle from the other factions were showing to me as level 18 or below I think.
And I was already well past level 20, I assure you, so I thought it was weird that the factions would give out these low level guns as rewards. But I do remember the scout rifle being the highest level gun being offered.
Edit: It’s what shows up when you hover your “cursor” over the gun, as opposed to what shows up in the next detail screen.