A newbie's question about AI's super weapons.

[terahsu]

Hi guys!

I finally finished my 1st game of Se-IV.
It's indeed a great experience to me.
However, I am puzzled of AI's weapons with 'H'
or 'M' mark.
For example, one AI palyer has Wave Motion III
gun with 'H' mark, its attack power is 450 !
And my Wave Motion III gun has only 150 !?

I tried to capture one of their ships, and scrap/analyze, I gained nothing new.

Why? I used only standard AI setting.
Is it a hidden advantage of AI players?
Is it possible for human player to have such
powerful weapons?

thanks for your reading.