Here is a modified version of my Dark Age -VA variant. All it does is to replace the Gauss with UAC/10 and add a couple of heat sinks.
Orion ON4-VAB
Mass: 75 tons
Tech Base: Inner Sphere
Chassis Config: Biped
Rules Level: Experimental Tech
Era: Dark Ages
Tech Rating/Era Availability: E/X-X-F-A
Production Year: 3125
Cost: 16 816 625 C-Bills
Battle Value: 1 614
Chassis: Unknown Endo-Steel
Power Plant: Unknown 300 Light Fusion Engine
Walking Speed: 43,2 km/h
Maximum Speed: 64,8 km/h
Jump Jets: None
Jump Capacity: 0 meters
Armor: Unknown Light Ferro-Fibrous
Armament:
1 Ultra AC/10
2 Medium X-Pulse Lasers
2 MML-5s
1 TAG
Manufacturer: Unknown
Primary Factory: Unknown
Communications System: Unknown
Targeting and Tracking System: Unknown
================================================================================
Equipment Type Rating Mass
--------------------------------------------------------------------------------
Internal Structure: Endo-Steel 114 points 4,00
Internal Locations: 5 LA, 5 RA, 2 LL, 2 RL
Engine: Light Fusion Engine 300 14,50
Walking MP: 4
Running MP: 6
Jumping MP: 0
Heat Sinks: Double Heat Sink 12(24) 2,00
Gyro: Heavy-Duty 6,00
Cockpit: Standard 3,00
Actuators: L: SH+UA+LA R: SH+UA+LA
Armor: Light Ferro-Fibrous AV - 228 13,50
Armor Locations: 1 HD, 2 CT, 4 LT
CASE II Locations: 1 LT, 1 RT 2,00
Internal Armor
Structure Factor
Head 3 9
Center Torso 23 35
Center Torso (rear) 10
L/R Torso 16 22
L/R Torso (rear) 10
L/R Arm 12 24
L/R Leg 16 31
================================================================================
Equipment Location Heat Critical Mass
--------------------------------------------------------------------------------
Medium X-Pulse Laser RA 6 1 2,00
MML-5 RA 3 3 3,00
Medium X-Pulse Laser LA 6 1 2,00
MML-5 LA 3 3 3,00
Ultra AC/10 RT 4 7 13,00
TAG LT 0 1 1,00
@Ultra AC/10 (20) RT - 2 2,00
@MML-5 (LRM) (48) LT - 2 2,00
@MML-5 (SRM) (20) LT - 1 1,00
@Ultra AC/10 (10) LT - 1 1,00
Free Critical Slots: 0
A modification to the ON2-VA with UAC/10 and MPLs and SRMs doesn't work because i get a ton that can't be used, not without actuator modifications or replacing the TAG with MPL. Unfortunate... but we can make a spiritual predecessor for it.
Let us assume some of the remaining ON1-VA got a field upgrade during the Operation Guerrero (earliest time we can have UAC/10 available, could do this during the Clan Invasion with LB-10X).
By using 12 DHS and Ferro-Fibrous, we can have MPLs in the arms along with SRM-6, and UAC/10. Now, the bad news is that there is no CASE. I really think CASE should be a D-class refit, not a factory-level thing but can't do anything about that. I filled the final half a ton with extra Small Laser, at least it gives some crit padding to SRM ammo.
Orion ON1-VAB
Mass: 75 tons
Tech Base: Inner Sphere
Chassis Config: Biped
Rules Level: Tournament Legal
Era: Clan Invasion
Tech Rating/Era Availability: E/X-X-E-A
Production Year: 3057
Cost: 6 996 938 C-Bills
Battle Value: 1 514
Chassis: Unknown Standard
Power Plant: Unknown 300 Fusion Engine
Walking Speed: 43,2 km/h
Maximum Speed: 64,8 km/h
Jump Jets: None
Jump Capacity: 0 meters
Armor: Unknown Ferro-Fibrous
Armament:
1 Ultra AC/10
2 SRM-6s
2 Medium Pulse Lasers
1 Small Laser
Manufacturer: Unknown
Primary Factory: Unknown
Communications System: Unknown
Targeting and Tracking System: Unknown
================================================================================
Equipment Type Rating Mass
--------------------------------------------------------------------------------
Internal Structure: Standard 114 points 7,50
Engine: Fusion Engine 300 19,00
Walking MP: 4
Running MP: 6
Jumping MP: 0
Heat Sinks: Double Heat Sink 12(24) 2,00
Gyro: Standard 3,00
Cockpit: Standard 3,00
Actuators: L: SH+UA+LA R: SH+UA+LA
Armor: Ferro-Fibrous AV - 231 13,00
Armor Locations: 5 LA, 5 RA, 2 LL, 2 RL
Internal Armor
Structure Factor
Head 3 9
Center Torso 23 36
Center Torso (rear) 10
L/R Torso 16 22
L/R Torso (rear) 10
L/R Arm 12 24
L/R Leg 16 32
================================================================================
Equipment Location Heat Critical Mass
--------------------------------------------------------------------------------
Medium Pulse Laser RA 4 1 2,00
SRM-6 RA 4 2 3,00
Medium Pulse Laser LA 4 1 2,00
SRM-6 LA 4 2 3,00
Ultra AC/10 RT 4 7 13,00
Small Laser LT 1 1 0,50
@Ultra AC/10 (20) RT - 2 2,00
@SRM-6 (30) LT - 2 2,00
Free Critical Slots: 17