Isa 54:17 No weapon formed against you shall prosper, And every tongue which rises against you in judgment You shall condemn.

Weapons have evolved over the years.
Imagine the surprise when the tribe armed with spears was confronted by the tribe armed with bow and arrow.
Or the American Indian with bows going against the western expansion armed with rifles.
WWII ended because no one could stand against the power of a new weapon – the atomic bomb.
But other nations developed the same weapon and a stalemate developed.
When you are a Christian you possess the most powerful weapon of all – the word of God.
Through it, no other weapon will prosper.
That’s not to say that manmade weapons won’t end your life.
But remember what Jesus said.
Do not fear those who kill the body but cannot kill the soul. But rather fear Him who is able to destroy both soul and body in hell. Matt 10:28
Manmade weapons can maim and kill a body but it is God’s word that is able to destroy both body and soul in hell.
It is also God’s word, the ultimate weapon, that offers salvation and eternal life to the same body and soul.