For those who want to play with numbers, sarna has the following stats for the

AC/10Tons: 12

Crits: 7

Cost: 200,000 (plus 6,000 C-Bills per ton of ammo)

So after adding the 2 tons of ammo you essentially have 14 tons available for use, but at most 12 tons can be put in the turret. The options for LRM and SRM carriers are below

For

LRMs:

6 * LRM-5 (and 2 tons of ammo) (this should be a common refit using similar mounting brackets) (180,000 C-Bills)

2 * LRM-10 (and 4 tons ammo) (200,000 C-Bills for LRMs)

1 * LRM-15 (and 7! tons of ammo) (might be worth it removing 5 tons of ammo to fit in a medium laser, 3 heat sinks, and a Power Amplifier) (175,000 C-Bills)

1 * LRM-20 (and 4 tons of ammo) (250,000 C-Bills)

(30,000 C-Bills per ton of ammo)

For

SRMs:

12 * SRM-2 (and 2 tons of ammo) (120,00 C-Bills just for launchers)

6 * SRM-4 (and 2 tons of ammo) (360,000 C-Bills just for launchers)

4 * SRM-6 (and 2 tons of ammo) (320,000 C-Bills just for launchers)

(27,000 C-Bills per ton of ammo)

(any of these could be a common refit, though the SRM-2 would be the most likely due to cost)

If i wasn't for stacking rules, one thing you might try to do with the LRM-20 version is park 3 close together, to pretend you are an

LRM carrier. When enemy units come in to deal with you, your infantry can have fun with all sorts of short-ranged anti-Mech weaponry.