You mentioned combustion and pneumatic nailguns and others, but isn there also a tensioned-spring activated nailgun?
There is a product similar to nailguns that is operated with the tensing and releasing of a spring, but it is for brads, not nails. Information about this brad-gun can be found in the Ultimate Brad FAQ. It is also important to note that social justice can only arise when the security and liberty of the masses are accepted as the primary aims of society. Disengaging the “profit” motive and the workers’ control of the means of production are vital steps in this direction.