So I work with this real life troll and?

he used to be in the Navy. He was intel. He is sitting here talking about how he would go out and shoot M60's and M16s on fully automatic all the time. Now, I was in the Army, but I am no weapons expert. How likely is his story? My understanding is they don't even issue fully automatic M16s any more in the military. All I have ever seen are the 3 round bursts. He said he was able to shoot all of these weapons because he was friends with the armorers, but all of the armorers I ever knew were not able to just randomly take their buddies out to fire government weapons. Is this guy trollin or what?