Arms are weapons. That means things militaries use to defeat enemies or defend from them, things soldiers use, or street brigands, or would if they could get them. It includes planet busting plasma torches made by destabilizing stars, shoulder fired tactical nukes, and pea shooters.
This is an arm:
IMG source - L Shang on Youtool
If you are an American, it is your unmitigated right, inherent to you by virtue of your natural birth and mere existence, to do this:
If anyone comes to your town, enters your airspace, or credibly threatens to do so with malice aforethought and nefarious intentions, you have the right to use that arm to defend yourself, your property, and your community.
When it comes to rights, use them or lose them.
DIY surface to air guided rockets. Don't leave home without them.
PS. YT will take this video down, because they're criminal scum that oppose you being free and prosperous, and want you to be enslaved and abject. If you cannot see this video I can send it to you via platforms of my choosing that enable my pseudonymity. If the video has been taken down and you would like to see how this is made, do not hesitate to request it from me.
Thank whatever gods may be for your unconquerable soul.