When the Clans invaded originally more of the advanced Star League tech was not available though more recent materials has it sprinkled in being discovered after 4SW and more prototypes available during the War of 3039. But the majority of that improved technology was reserved for House regiments which left the unlucky mercs soldiering on with still adequate weapons but distinctly behind the tech curve. After the Clan Invasion, mercs & non-House troops started getting their hands on Star League spec weapons and even some of the improved designs. The mercs getting that however would be the most prestigious (ELH) or best connected (Kell Hounds) though often as part of their contractual agreements in turning over Clan tech. But the upgrade kits and recovered weapons start becoming more available at least by 3055 (since mentioned in FM Mercs) so the average merc commands, successful but not outrageously lucky, might be able to start getting their hands on some of those systems.
You run a independent mech repair & customization shop on Galatea and finally see enough of the new weapons in the pipeline to add to the services your shop will offer- help those middle of the road mercs get some upgrades! Sure you can put on one of those League produced upgrade kits with their engineer drawings and step by step instructions but you want to market to the commanders & techs of units that might not be able to afford such drastic rebuilds. A single advanced weapon system mounted on a mech to increase its lethality on the most common chassis so your shop can have a standard plan to work off for economy of scale.
So taking what are the most common mechs- the following 3025 designs- what single weapon would you replace with a more advanced system and what would be the selling point? Assume conversion to DHS as appropriate and it can either be simple with the design underweight or just mention juggling slots. Please no design sheets, but link to the appropriate sub-forum if you wish.
Two personal examples would be the Warhammer, particularly the -6D or -6L . . . because its energy load, it gets the straight DHS conversion, and with Warhammers its all about the PPCs so of course they get ERPPCs instead. The design would still have the armor problems of the -6 series, but now the AM Workshop offers a much needed range upgrade to the Warhammer 6 series for poorer mercs. A second example would be the old faithful Centurion 9, replace its AC/10 with a LB-10X and use the weight difference for another ton of ammo- but no DHS, its pretty heat balanced. The trooper medium is not any faster like the upgrade design but its main gun now has a bit more reach and can pelt mechs or armor. No DHS only please, looking for just the single weapon system emphasis.
About the only exception I would say is the Hunchback -4G being given a Gauss Rifle, we get fluff later on that says they tried but kept having problems with the design IIRC.
Weapons available by 3055-
Gauss Rifle
ER PPC
ER LL
LB-10X
UAC/5
SSRM2
Large PL
Med PL
Small PL
NARC Launchers
Blazer Cannon (for those who go nuts over them . . . )
Common mechs of course go back to the original box and a few more in 3025
Light
Wasp, Stinger, Locust, Javelin, Spider, Firestarter
Medium
Griffin, Wolverine, Shadow Hawk, Hunchback, Dervish, Enforcer, Centurion, Vindicator, Phoenix Hawk, Cicada
Heavy
Thunderbolt, Rifleman, Warhammer, Archer, Orion, Jagermech, Catapult, Crusader
Assault
Battlemaster, Victor, Stalker, Zeus
So what do YOU think would make a good first couple single weapon upgrade offerings for the After Market Workshop?
Edited to add mechs I feel silly forgetting.