I have one - it's the first "AR" type rifle I've owned.I adore this rifle!
I used the LTC Santos Improved Battlesight Zero
to sight it in, then started flinging M193 ball ammo at a target 50 yards downrange. My 40+year-old eyes couldn't make out the rings on the target; all I could see was a fuzzy white rectangle. I aimed for the center of the fuzz and squeezed off 30 rounds, firing from a sitting, supported postion (arms supported by bench table) - no sandbags.
When I finished, I found 13 rounds inside the 10 ring (2 inch diameter), with 8 in the bullseye
(one inch diameter)! The rest of the rounds were all inside the 9 ring (4 inch diameter). I've not had any instruction on shooting this style of rifle aside from what I've read on the forum (nose to charging handle, proper breath/trigger control, etc.)
I was absolutely amazed at how well the rifle did with a total newb like me behind the trigger. I can't wait to see what it will do when I put a scope on it.