One of our home-brew campaigns has the Periphery using chemical lasers as old tech the same way they use RL pods, but they could fit with a lot of the laser/ICE vehicle variants mentioned in the TROs. And could also give rise to new variants...
<cracks knuckles> So let's go!
Vedette - replace the AC-5 and ton of ammo with a large chem laser and 4 tons ammo. There's also a Capellan variant which replaces the AC-6 and ammo with a pair of medium lasers, six heat sinks and a power amplifier - put in four medium chemical lasers with four tons of ammo instead for an urban combat vehicle. Optionally, rip out one chemical laser and 1 ton of ammo and replace them with four machine guns (total armament is 3 medium chemical lasers and 5 MGs)
Condor hovertank - replace 2 medium lasers, 6 heat sinks, 0.2 ton power amplifier and 0.3 ton cargo with 3 medium chemical lasers, 4 tons of ammo and a forward machine gun. (Once Star League tech starts reappearing you can replace the new machine gun and a ton of chem laser ammo with an AMS and a ton of ammo for it)
Skulker - replace medium laser, 3 heat sinks, power amplifier and cargo with 1 medium chem laser & 2 tons ammo (it's intended to operate away from base for prolonged periods) and either a machine gun with 1 ton ammo (for anti-personnel use) or a vehicular flamer with 1 ton ammo
Scorpion - a courier or scout variant has two medium lasers, 6 heat sinks (lightening the turret enough for the power amplifier) and a ton of cargo space. Swap that out for 4 medium chemical lasers, 4 tons of ammo and 1 extra machine gun, use the cargo bay to carry an infantry squad and you've got an IFV with quite a bit of close-range punch. For the basic tank version, replace the AC-5 and 1 ton ammo with a large chemical laser and 4 tons of ammo (which lightens the turret by half a ton which can be used for another forward machine gun)
Pegasus - replace 1 medium laser and 3 heat sinks with 1 medium chemical laser, 2 tons of ammo and 1 ton SRM ammo (doubling base ammo), Replace 0.1 ton power amplifier with 0.1 ton cargo for a total of 1/2 ton cargo.
Saladin - replace AC-20 and 3 tons ammo with 8 medium chemical lasers, 7 tons ammo and 2 tons armour (doubling the armour protection of the vehicle)
Bulldog - replace large laser and 8 heat sinks with 2 large chemical lasers and 3 tons ammo. (power amplifier tonnage is used to upgrade turret mechanism)
Manticore - yes, it's got a fusion engine but the default heat sinks are taken up by the PPC. So replace the medium laser and 3 heat sinks with 3 medium chemical lasers and 1 ton ammo
Partisan AA vehicle - replace four AC-5s and 2 tons ammo with 4 large chemical lasers and 8 tons ammo, add one LRM-10 and 2 tons ammo (turret mechanism is lightened by 1 ton to make room for 2nd ton of LRM ammo)
Neptune submarine - replace large laser and 8 heat sinks with large chemical laser with 4 tons ammo, 2 tons LRT ammo, 2 tons SRT ammo (tripling torpedo launcher ammo)
