Just for fun, I shot mine at a club's fundraising rifle side-match this Summer.
I was concerned about how far they would shoot, and if the Carbine could handle it.
As it turned out, they re-shot a stage used in the pistol match earlier, whose targets were at something like 3-8 yards!
I only had 15-rd mags, and it was a 21 round stage, so I was one of the few that had to reload.
Which I fumbled.
The mag didn't have enough weight to drop free with only a couple of rounds in it, so it had to be pulled free. I already had my fresh mag in hand, so had to do some juggling.
Still, I placed fairly well due to getting good hits. I had an advantage in that the Carbine's bore-to-sight line is low as compared to the AR15s that most used. They had to compensate for that, or take hits on the no-shoot.
I could hold dead-on.
Like I said, I shot it for fun, but I learned a few things:
-The bore-to-sight line allows holding dead-on at ultra-close range.
-I need to practice mag changes with it.
-It handles very well. We shot around a barricade, and I had no trouble keeping the muzzle from striking the wall while staying in the box.
-It stays on target pretty well. There was some bouncing around, but mostly I just had to shoot.