Currently only existing in gun form, likely due to the presence of better options for pacifying targets in a non-lethal manner up close, concussive firearms use a directed blast of focused graviton particles which disperses a substantial amount of kinetic energy on impact in order to cause a widespread, “pins and needles” feeling around the impacted area. Hits from concussion guns often serve their purpose of causing a loss in control of motor functions where they have landed, and shots that land on the upper half of a target’s head will frequently render them unconscious or severely disoriented and unable to move with any semblance of coordination for minutes after while their body gradually recuperates. This has been found to be effective against both organic and synthetic beings alike, and quite a humane option for one to carry on them mostly worry-free, as they cause no direct harm to those fired upon besides bruising from the projectile and the potential for collateral damage should anybody affected stumble and fall due to the loss of control. These risks though, more than pale in comparison to the potential grievous and long-term harm other options for self-defense may do.
Concussion weaponry is dissipated through thick padding and thicker fabrics, such as those found in various armors. Thus, concussive weaponry is most effective against unarmored targets, but can still knock over and disorientate armored targets.