The reviews have been mixed, about 50-50. Some seem to be tanks and hold up to thousands of shells, others seem to repeatedly break. Might be operator error/abuse.. Dunno, guess I'll find out for myself.. It did surprise me how much it weighs compared to the size, seem hefty. Which is reassuring, I like the idea of having a decent amount of steel between my cheek and the chamber...
I like aimpoints, I'm intimately familiar w/ the M4 (red dot). I don't want to drop more than a couple hundred until I decide how well this thing is gonna hold up - although I guess I could always put a more expensive dot on my M4 (rifle) if it doesn't stay on the KSG..