Here's my mech...

Name: Dragon Mk.810

Type: Two legged walker
Speed: 550 km/h walk, 895 km/h run

Height: 22m 76cm
Weight: Half a metric ton (I'll look it up later.)

Look: Two legs, two arms, a large thruster on the back, a cockpit, and a small machine gun under the cockpit.

Abilities: Rocket Jump - Allows him to jump and hover in the air for periods of time. Limited fuel.
Heat Sink - Help to keep in the battle longer: expells heat generated by the engine to prevent self-destruct or cool-down vent shutdown.

Weapons: LRM 30 - A swarm of 30 light-weight missiles home in on the target. Regeneration time: 45 seconds. Limited ammo.
Vulcan Canon - A heavy machine gun, able to pierce armor, but slow firing rate. 10 shots/second, Limited ammo.
EMP cannon - Able to shut down an enemy mech in one shot, it is not very accurate. Uses a lot of energy to shoot, and a miss could be fatal.