Real Story:
Following the final testing and trials of the YMS-09 Prototype Dom, the standard production type MS-09 immediately began rolling off the Zeonic Corps' assembly lines. Supplanting the recently-produced MS-07B Gouf as the mainstay ground combat unit of Zeon's mobile suit forces, the Dom line's place was assured as a agile, heavy-type mobile suit for the next several years. The first three production Doms were given to Zeon's "Black Trinary" aces and stationed as the frontline defense for M'quve's Odessa mining base during the One Year War. Though their amazing ground speed and agility gave the crew of the invading Federation carrier White Base a hard time, the Black Trinary was simply outmatched by the emerging Newtype abilities of RX-78-2 Gundam pilot Amuro Ray. Amuro was able to dodge the Black Trinary's infamous coordinated "jetstream" attack - destroying all three of the Doms in the process.

Model number:
MS-09
Code name:
Dom
Unit type:
mass production ground combat mobile suit
Manufacturer:
Zimmad Company
Operator:
Principality of Zeon
First deployment:
UC 0079
Accommodation:
pilot only, in standard cockpit in torso
Dimensions:
head height 18.6 meters
Weight:
empty 62.6 metric tons; max gross 81.8 metric tons
Powerplant:
Minovsky type ultracompact fusion reactor, output rated at 1269 kW
Propulsion:
"ground effect" hover jet thrusters: 58200 kg total
Performance:
maximum thruster acceleration 0.71 G; maximum ground running speed 90 km/h; maximum ground hovering speed 240 km/h
Equipment and design features:
sensors, range 5400 meters
Fixed armaments:
scattering beam gun, mounted in torso; heat saber Type2, battery powered, stored in recharge rack on back, hand-carried in use
Optional hand armaments:
H&L-GB03K/360mm giant bazooka, clip-fed, 10 rounds per clip; ZMP-50D/120mm machine gun, drum fed; VAL-RB-T27/880mm rocket bazooka; MMP-80/90mm Ver.8 machine gun

KHI alternate universe story:
Developed by Adrian Zimmad with the experience of the "ground effect" hover jet thrusters made up with the MSM-03 this unit seems bulky but it can travel at 240 Km/h thanks to the special shaped legs.
but this unit even if so advanced have been refused to be mass produced due to the thin armor on the cockpit area

Model number:
MS-09
Code name:
Dom
Unit type:
Prototype ground combat mobile suit
Manufacturer:
KHI (zimmad design)
First deployment:
2022
Accommodation:
pilot only, in cockpit with panoramic monitor in torso
Dimensions:
head height 18.6 meters
Weight:
empty 85.6 metric tons; max gross 97.8 metric tons
Powerplant:
H3 type ultracompact fusion reactor, output rated at 1269 kW
Propulsion:
"ground effect" hover jet thrusters: 58200 kg total
Performance:
maximum thruster acceleration 0.71 G; maximum ground running speed 90 km/h; maximum ground hovering speed 240 km/h
Equipment and design features:
sensors, range 5400 meters
Fixed armaments:
Flash stun gun, mounted in torso; heat saber Type2, battery powered, stored in recharge rack on back, hand-carried in use
Optional hand armaments:
Optional hand armaments:
9-A70 125mm Compact autocannon; TOZ-338 185mm Canister cannon (shotgun); 6-R55 420mm Anti-MS Rocket launcher;

Constructive criticism approved