Wing Commander CIC

What types of hand held weapons were available to the ground forces of the Terran-Kilrathi War? What was the type of weapon that Jazz used to murder Specialist McGuffin? It looked like a projectile weapon to me. What about those weapons that both Terran and Kilrathi marines seemed to use a lot in WC1 that disintegrated people in a single shot? Were those laser weapons of some sort on a high power setting? And what about the weapons that Vagabond and the Confed security team used in the battle on the comm station? Were they just another type of laser?