do a google search for magpul troy drop test...you may be surprised
Nothing here surprises me. I would think the Magpul sights would perform well in a drop test, since they are spring-loaded, and would fold down under pressure.
The spring is also the weak link of the design, though. It they break, you are left with a floppy sight that won't stay deployed. I believe Sturmgewehr has a Youtube video explaining such an experience.