Jem'Hadar

Plasma Weapons - Jem'Hadar carried plasma weapons in both rifle and pistol variants, capable of firing lethal disruptor bursts with anti-coagulants that were designed to slowly kill their enemies if the burst itself did not. The weapons had at least two other settings: they were able to stun, and to fire a more powerful burst capable of vaporizing a humanoid target.
Kar'takin - In close quarters, Jem'Hadar preferred the kar'takin or shock blade. The kar'takin was a short polearm with a straight-edged blade and a stabbing point.
Houdini Mine - "Houdinis" were a type of subspace anti-personnel mines used some Jem'Hadar. The nickname "Houdini," referring to Human illusionist Harry Houdini, was given to the devices by Starfleet troops on AR-558 because they hid in subspace and appeared at random. The mines were an effective psychological weapon, because there was no way to predict when or where they would appear.

Uniform - Jem'Hadar uniforms allowed their wearers to be almost completely unaffected by many forms of anti-personnel force field.