Depends on if you are talking about military or civilian and what "strongest" means to you.
Ruger No 1
Suoer Augilla 22 LR
Strongest is an adjective. It's the superlative form of strong.
the strongest part of a soccerball is where you pump in the air that way if you kick it there you will get alot of effect
The strongest part of a hurricane is the eyewall, just outside the eye.
your teeth
The chassis.
its exoskeleton
leg
It is the eyewall.
The strongest part of the body used for self defense is both the knee and the elbow.