A local 2-gun match I have gone to a couple times has an Armored class, requiring plates:
Last match about six shooters did it. Saw a couple guys wearing helmets, including the MD/Organizer. Very nice match with what I consider some nice stages. The guys doing the Armored class seemed to cover a spectrum. I think they might be required to sling a rifle, even if it si a pistol only stage.
They are probably the most enjoyable matches I have done, even with some of the stages being tough for a guy in my age group. They are doing nice courses of fire without too much obsession on total fairness, with nothing being unreasonably difficult to achieve. One stage included hitting a target, then laying your rifle on the ground (in the mud...), throwing a kettlebell as far as you could, where it landed was your next firing position, repeat until the KB is over the finish line. If you were over forty the KB was ten pounds lighter (25lbs), I argued over sixty should get to throw a softball!
Anyway, some young dude (who was smoking like a chimney between each stage) managed it in about three throws (I needed 5-6) and did it in about half the time, with the heavier KB.