Ok. I don't know why, but I was under the impression caseless AC ammo simply allowed a standard AC (granted, I used Light ACs) to double its ammunition count at the risk of exploding the weapon on a 2. Didn't realize they were actually supposed to be a separate weapon. Easy enough to just make all the caseless ammo sets standard, then.
Unfortunately, you are incorrect....here is an example of a Caseless aremed mech
BattleMech Technical Readout
THB Weapons
Type/Model: Blackjack-Caseless BJ-1
Tech: Inner Sphere / 3025
Config: Biped BattleMech
Rules: Level 3, Standard design
Mass: 45 tons
Chassis: GM BJ-I Standard
Power Plant: 180 GM Fusion
Walking Speed: 43.2 km/h
Maximum Speed: 64.8 km/h
Jump Jets: 4 Whitworth Jetlift Standard Jump Jets
Jump Capacity: 120 meters
Armor Type: StarGuard II Standard
Armament:
2 Caseless AC/5 (THB)s
Manufacturer: General Motors
Location: (Unknown)
Communications System: Dalban Micronics
Targeting & Tracking System: Dalban AQ
--------------------------------------------------------
Type/Model: Blackjack-Caseless BJ-1
Mass: 45 tons
Equipment: Crits Mass
Int. Struct.: 75 pts Standard 0 4.50
Engine: 180 Fusion 6 7.00
Walking MP: 4
Running MP: 6
Jumping MP: 4
Heat Sinks: 10 Single 3 .00
(Heat Sink Loc: 1 LT, 2 RT)
Gyro: 4 2.00
Cockpit, Life Supt., Sensors: 5 3.00
Actuators: L: Sh+UA R: Sh+UA 12 .00
Armor Factor: 120 pts Standard 0 7.50
Internal Armor
Structure Value
Head: 3 8
Center Torso: 14 16
Center Torso (Rear): 6
L/R Side Torso: 11 13/13
L/R Side Torso (Rear): 4/4
L/R Arm: 7 11/11
L/R Leg: 11 17/17
Weapons and Equipment Loc Heat Ammo Crits Mass
--------------------------------------------------------
1 Caseless AC/5 (THB) RA 1 90 7 11.00
(Ammo Locations: 1 LT, 1 RT, 1 CT)
1 Caseless AC/5 (THB) LA 1 4 8.00
4 Standard Jump Jets: 4 2.00
(Jump Jet Loc: 2 LL, 2 RL)
--------------------------------------------------------
TOTALS: 2 45 45.00
Crits & Tons Left: 33 .00