[Darksheare]

Because some critters can take 2000 foot pounds of damage and still have you for breakfast.

Besides, the Stryker civilian control vehicle is vulnerable to 50 cal rounds.
Banning said rounds would in effect open the door to abuses of power with impunity.
Some would say that this is tinfoil hat stuff, but why be stupid and leave the door open for the possibility of above mentioned to occur?

[American in Israel]

Besides, the Stryker civilian control vehicle is vulnerable to 50 cal rounds.

Indeed, why would anyone need a Stryker civilian control vehicle? But they exist, and that is the reason why we need 50cal rifles. It is the truth that the declaration of Independence was founded on, and the strength of our Nation that the people are assumed to outrank the Goobermint where void and prohibited by the Constitution, no matter which brand of Judge interprets it. It is a system that has worked for 200 years without problems, the sudden "need" of the Goobermint to change that is, shall we say, very suspicious.