Combatdynamics is an addon mod for the Voltaic Mods which extends the combat aspect of them.
There are some basic weapons categories to know:
1: Radioisotope Injectors, the classic set of weaponry added before Combatdynamics was a thing. These use Electrodynamics and Nuclear Science components to create very overpowered injectors which give 5 minutes of radiation to the target (this used to be indefinite, but was reduced in Combatdynamics V1 Beta 2 for balancing)
2: Chemical Weapons. This currently only includes the Chemical Sword and Pepper Spray. More will be added later. These give specific vanilla effects to disorientate the target.
3: Ranged Weapons. This only includes the handheld CIWS as of now. They fire projectiles which damage targets. More to be added later.
4: Melee Weapons. There are many melee weapons to be added, such as Handheld Tasers, Reinforced and Hardened Rods, Copper Whips, and even more. Their effects vary.
The other pages explores each weapon in more detail.