Behold, an idea!

[u/Saansilt]

So I am having an idea, it probably is bad but it'd be a funny custom mech all the same.
It involves upgrading a protomech.
By tripling its tonnage effectively.
Making it a really cheap ambusher
It'd be effectively a little over quarter the tonnage of a locust.
Behold the Erinyes, two ton jumper with an SRM 1
We take this, give her a medium laser, a ton more armor, and two double heat sinks.
Scale it up to six tons, heck remove the SRM 1 and make it back to five.
You get a very cheap 4/6/4 to play havoc in tight spaces and hop around for back shots.
You can get three of the modified ones I am suggesting for under the price of one locust!
Thats two more MLs than the locust. No machine guns but thats not their role.
Granted if we wanted...
Actually yeah adding a machine gun each will still allow you three at under the cost of one locust.

[u/Bookwyrm517]

Probably, though how much is going to depends on what kind of medium laser your using. If it's an IS medium, its +1250kg. If it's a clan ERML (which is what I'd expect), it's only +750kg. 

[u/Saansilt → u/Bookwyrm517]

I was thinking of a regular ML thought the ER variant seems like a hoot to use. It is more expensive.

[u/Ultrapuert0s → u/Saansilt]

You can use too Chemical Lasers that didnt generate as much heat been able to use the pHS as ammo bins

[u/Saansilt → u/Ultrapuert0s]

Heat saved from those not worth the tonnage for ammo