Talk:Maya/@comment-80.72.55.253-20180118115458/@comment-68.146.133.92-20180218065856

12.7cm Twin HA LM is a main gun, and can't be fitted to Maya. Same with 12.7cm Single HA LM.

The standard 12.7cm Twin HA is a secondary gun, and will permit Maya to perform her (weaker) AACI, but will only allow the Cut-In Artillery Spotting instead of the Double Attack. I'd recommend using the 8cm Twin HA (from Agano-class) in its place for the slightly better AA and accuracy. The 12.7cm Twin HA+AAFD is far too expensive and doesn't give Maya any extra capability over the previous two guns.

Realistically? Tanaka hands out Reinforcement Expansions at every quarterly event, plus there's four available from regular quests. Use one, then you can have your cake Double Attack and eat it your AACI too.