I own a couple of them, and of the two problems I had with them, one was purely ammo related, and the other had an extractor spring go bad. With the problems fixed they have both been totally reliable.
I don't know of anyone who shoots huge volumes of ammo with them.
Maybe they'd come up short if you had to shoot 500 zombies without cleaning, but I don't know anyone who does that
One day at the range I saw a guy with an FAL fighting malfunctions. I was tempted to walk over and adjust his gas regulator, but I doubt he would have appreciated it
