At the range, the forend performed well. I had zero issues. I tried torquing/twisting on the optic, and it didn't budge. I sighted in my red dot at 25y, 50y, and 100y. I adjusted my aimpoint 35 clicks up in elevation and NONE for windage. Even out to 100 yards, the optic was dead on with windage due to the perfectly centered top plate. I put 150 rounds through the gun today. My point of aim/point of impact did not change through out the day. I was able to cowitness the iron sights, and yes this is a true cowitness. It's a little bit lower than what I would consider 1/3 lower cowitness, but it works just the same! AKs are notorious for bad iron sights, this is a great to have a secure way to mount a RDS and make a HUGE upgrade from the irons! In the event your optic fails, this mounting system gives you your weapon's original irons as a backup, a very nice feature that should be a requirement. I adjusted my iron sights to the same point of aim as my RDS without even firing a shot, and at 100y, was pretty much on the money. You could also do this in reverse. If your iron sights are already sighted in, adjust your RDS to your iron sights point of aim and save yourself some time/ammo!
I was at a fairly strict range, so I could not get off a full out mag dump. I did "dump" the whole 30 round mag with 1 second in between shots, and this was after me firing about 100 rounds through it already. The handguard never got hot. It seemed to get rid of the heat well, and only got to a mildly warm temperature. I was shooting with bare hands and it was 94 degrees outside, so I was impressed. My optic did get a little warm, as did my flashlight, but it didn't get to a level that would concern me. I was able to grip the handguard well (even with a wet hand) without slippage.