Just a bit of out of universe explanation. I thought it would be fun to show a description of the Roadrunner from it’s originally fluffed perspective, as a ghost that moved very fast, only noticed by Comstar. I hope you all enjoy the read….
New Threat Report. Adept John Helder, ROM Analyst, 01-17-3051
Intercepted Audio Log. Date: 06-12-3050 Planet: Toland
"..... damn... that little ... fast. Clocked at ... two hundred and forty ... hour. Barely register... vibrations. Less than... tons."
Intercepted Audio Log. Date: 07-01-3050 Planet: Twycross
"It came from no where. Hit the fuel depots and disappeared. Haven't seen it in 3 days."
Acquired Mission Log. Date: 11-22-3050 Planet: Malibu Unit: Covert FC Unit, designation unknown
"Our squad got hit by a light star of mechs. A Dasher, two 'Mechs that appeared to be Locusts with Clantech, and two very small bogies. Vibration monitors put it at 15 tons, but it's armed with two of the Clan Medium Class Lasers, the ones that put our Large Lasers to shame. The ultralights sped up as soon as they pinged us on magres. We lost two Swiftwinds before we even knew what hit us. The sight of our Spider and repurposed Raven seemed to scare them off, but their damage was not insignificant. We've pulled back to our dropship and will be extracting shortly. We're too compromised."
Unknown 'Mech Temporary Designation: Roadrunner
Possible Clan Designation: Emerald Harrier
Sightings: 12
From the data we have been able to discover on the Roadrunner, it appears to be an ultralight class 'Mech. Similar to the experimental Fleas of the Succession Wars (see technical file 164-012), it mounts minimal armor and a light armament, for a Clan Mech. Vibration monitor reports that its mass is just 15 tons. From visual analysis, the armor is Ferro-Fibrous and knowing the restrictions of Clan Mech production, it likely is fitted with just 1.5 tons of the plating. Speeds have been clocked as high as 240kph, which would imply a Class 210 engine.
Armament needs to be confirmed, but with visual logs showing only two muzzles and golden laser beams, we assume them to be Clan Extended Range Medium Lasers. Those two combined can outgun many Inner Sphere medium mechs from just 25 years ago.
My analysis shows that while the 'Mech is extraordinarily fast, the minimal amount of armor is key to it's defeat. Medium Class Lasers can go internal at any location on the 'Mech. It is theorized that a well placed hit from a Large Class Laser will completely destroy the 'Mech. Pulse Laser Technology, especially the Large Class will be key to defeating this 'Mech if it appears in large numbers anywhere in the future. The LB-10X Autocannon, especially used en-masse could also be an effective deterrent to this effective striker. Any forces facing the Roadrunner would need utilize terrain to slow it down enough to be hit. Urban Environments also do not suit the 'Mech as the tight cornering would reduce the maximum speed of the chassis.
Threat Level: 4 - High
Probability of Mass Threat: 1 - Low