Versions of this build can run on any of the Jager variants, but unless I missed it, it isn't posted here for the -A. If that's on purpose or if I missed a previous post and this is a duplicate, apologies! Just figured we should have it here for consideration alongside the builds that are specific to the -A.
If you don't mind going a bit slower (after you elited the mech) then you can do this: You get 2x ML, helps after you use up your ammo in a long game.
As an advice never post "lemon engine" builds, even if you don't have the better one xl265 it's same weight with more speed. That said, this is my dual gauss Jager :
Motorhead: d'oh, thanks! Looks like I need to do another pass of selling off all my lemon engines. I try to keep them out of my warehouse, but I must have bought a mech that came with a 260 somewhere along the way.
And here's the guide that sums all up: https://www.mechspecs.com/resources/redundant-engines-to-avoid-or-sell.4/ In this case for the ENF-4R
Nowadays I'd try to go with a Light Engine, just because Gauss explosion carrying over and the huge ST fins make Gauss Jagers very vulnerable. If 50 round isn't enough, full magazine capacity increases it to 60