Because there's a Marauder Battle Armor, the logical extension is Catapult Battle Armor. "Logical". Had actually an idea for "Mad Cat" BA, so this was an intermediate step.
Heavy, jumps 2. Has MagClamps like the Marauder armor.
10 points of armor.
Armament consist of twin APWmounts in torso and each arm has a LRM-2 rack, with each rack having 4 shots (i edited shot amounts to code block below, MML didn't export it correctly, 4 shots weights about 66.4kg). Larger racks weren't possible in order to keep the aesthetic because ammo has to share the launcher location.
Finally, the thing has a TAG just like the Marauder BA.
This all should fit just about to 1500kg.
Catapult Battle Armor (Standard)
Type: Catapult Battle Armor
Manufacturer: Unknown
Primary Factory: Unknown
Tech Base: Inner Sphere (Standard)
Chassis Type: Biped
Weight Class: Heavy
Maximum Weight: 1,500 kg
Battle Value: 301
Swarm/Leg Attack/Mechanized/AP: No/No/Yes/No
</p>
Equipment Slots Mass
Chassis: 300 kg
Motive System:
Ground MP: 1 0 kg
Jump MP: 2 250 kg
Manipulators:
Left Arm: None 0 kg
Right Arm: None 0 kg
Armor: Standard (Basic) 0 500 kg
Armor Value: 11 (Trooper)
Slots
Weapons and Equipment Location (Capacity) Mass
Magnetic Clamps Body 2 30 kg
Anti Personnel Weapon Mount Body 1 5 kg
Anti Personnel Weapon Mount Body 1 5 kg
LRM 2 Right Arm 2 120 kg
LRM 2 Left Arm 2 120 kg
LRM 2 Ammo (4) Left Arm 1 0 kg
LRM 2 Ammo (4) Right Arm 1 0 kg
TAG Body 1 35 kg