Was there a front grip on the weapon or did he have no idea how to hold it?
Looks to me like it had a front grip added that busted off. You can see it laying on the ground as he walks away. Comments refer to it being converted and the grip breaking due to bad modification.
I'll bet that hurt. How does a range allow you to use that gun?
Yup, the front grip came off. I don't know why they would want a forward grip on a Glock 18 attached by just the rail system right under the muzzle, in my mind that is asking for problems. (As an aside, I do know how useful a VFG is on a full auto weapon, I've done plenty of shooting with them, but the set-up on that weapon system is not ideal in my mind).