🚀 go-pugleaf

The law of action and reaction holds. Another rule that is valid is : F=m*a
If you assume that the mass of the bullet < mass of the gun + mass of man 
holding it you'll see that the bullet is accelerated to a higher velocity.

The bullet will in fact get a much larger part of the kinetic energi released
as the gun is fired. (K=m*v^2 /2). You can also see this if you apply the rule
of conservation of the linear momentum the the problem.

Therefor it is not in conflict with (but a consequence of) the law of action
and reaction that a bullet can knock down a man while the man firing the gun
hardly is affected. 

You don't need to be a physics god to see that ....... Sven