I fondly remember my first FA experience. My word, I was spoiled.
I was in a position to be offered the opportunity, by a USMC Colonel, to invite two dozen of my close friends and colleagues to all go down to Marine Corps Base Quantico and spend a day at the range. We arrived early and had an array of armaments available to us to shoot.
In addition to non-FA offerings, like the Beretta 92 9mm, Remington 700-based sniper rifle, and others, we all got to shoot the HK MP5-SD, Colt M4, SAW, M2 Browning, Mk 19 grenade launcher. I even fired a SMAW (an 83mm RPG), with which I got to blow stuff up!
It was one heck of a day...but it was all in the pre-cell phone era, so there is no video.