It is not pacifism but it should strive to be pacifism and should only use force when absolutely necessary, in self-defense.
There is no need to use excessive force, even for self defense, sometimes it's enough if you talk through the situation, and in confrontations, its enough if you disarm the agressor, there is no need to agress further.
For example shooting the agressor in the foot once is pretty deterring, there is no need to use lethal force.
If we have good manners and way to de-escalate conflict then violence will almost never be necessary.
RE: Voluntaryism is NOT Pacifism