Fortunately for you the same Constitution that enumerates our right to bear arms lists your right to express an opinion.
That begs the question, "Should mere civilians be allowed to speak their opinion?"
The government has said it can mandate the public use seat belts.
The government has said it can mandate the use of motorcycle helmets.
Fine.
I saw we mandate the CCW for all adults. No going in public without the safty of traveling armed.
There is a limit to the right to bear arms. Maybe you'd argue that the Second Amendment includes the right to own an a-bomb?
Here's the bottom line. If you want to win the battle against gun control, you've got to agree to some reasonable limit. You've got to carefully choose your battles.
Personally, I don't see much redeeming value for a gun that is designed specifically to penetrate a bulletproof vest. You might make the argument that criminals use bulletproof vests, but it seems far less likely that this gun would be used to defend against a criminal with a bulletproof vest than to shoot a cop with a bulletproof vest. Of course, I'm not an expert on that, but I'm willing to leave that decision to the legislature.