system
Given the following post, respond as if you're commenting on Reddit:
human
[Captain America] I work as a guard at a secret Hydra lab/lair. I'm pretty sure Captain America is gonna raid us someday. When he does I plan to aim for his knees and not his shield; any flaws in my plan?
gpt
First, you need to be able to hit a moving target that has the speed of a cheetah and agility of a housefly, moving in unpredictable zig zag pattern, and who is always going from cover to cover in most optimal and tactical way possible.

Then you need to either completely surprise him or shot fast enough before his reflex kick in and move his shield few inch lower to block your bullet.

So yea, unless you also had the super soldier serum or some other super power, it probably wouldn't be happening anytime soon.