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It's sturdy, but installing a scope on it is a pain, at least if you wan't to keep it straight. As you tighten the torx screws, due to it's design the optic itself will cant, forcing you to keep turning it in the opposite direction every time you tighten a screw. To get it right, I suggest 2 bubble levels (one on the top of the scope, and another on the upper receiver). I also suggest taping a string to a wall and tying a weight on the bottom so it hangs straight down. Aim the scope at the string and use that, as well as the bubble levels, to keep the scope straight as you tighten the screws.
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