Whatever guys, I've literally had THREE sets, all three from different vendors, tow in Canada - one in the US. They all came in legit magpul packaging and were legit magpul products.
They simply were not as solidly built as ARMS, Daniel Defense, Larue, etc. They just weren't. I'm sorry, but I call it like I see it. Plastic sights aren't the pinnacle of rigidity and accuracy.
And no, I'm not down on Magpul products. I really like 99% of their stuff and run their mags and stocks on several guns. I no longer run their MBUS sights.