The AC/5 is never an efficient weapon, but there are mechs that use it reasonably well. Zeus, Trebuchet -7K, maybe even the super-bug known as the Clint.
A new mech variant from Record Sheets Succession Wars, the Atlas AS7-A is not one of those mechs.
.....
The weight saved by downgrading the two big guns on a classic Atlas are plowed into SRM tubes. Lots of them, giving it something in common with the Zeus -6A. Thirty SRM is a lot of firepower, no matter how you look at it. With four tons of ammo, you even have a couple turns more fire than the old AC/20 did. However...
However, it took me at most fifteen seconds to come up with the obvious upgrade. I’m sure somebody will mention it within five posts.
You know, a good fast light can dodge an AC20 shot... usually.
But I'm so sure I'd want to try to dodge 30 SRMs.
That is a new high for SRMs on a L1 Mech I think.
I'd be interested in trying out the A as a "finisher" in an Assault Lance.
As for the obvious upgrade....
Is it 24 Streak Tubes with 1 Ton of Ammo?
20 Streak Tubes w/ 1 Ton & use the other 3 tons to upgrade the to a RAC-5 & double ammo?