_ Be careful with the ghost heat. ECM long range sniper: it should work on paper, but in practice I'm really skeptical about hardpoint position. It should be battle tested once it will be available.
Hmm how about 2XERLARGE instead of the peeps? 2 points less damage but way better heat dissipation and has the same range of the gausses plus can mount either more gauss ammo or an ams. I know 3xERLARGE would be better but sadly no more hardpoints.
Because FNR-5B "Hidden meta's arm" (2xGR, 3xERLL, ECM, LE325) + alts would be better in every aspect: better hardpoint location, better quirks (armor and especially heat gen), +1 ERLL. The only way to make it "unique" is to boat JJs, so it can actually reach otherwise inaccessible locations... But it feels too niche and it doesn't have enough firepower compared to other snipers to justify it: a Black Widow (warhammer 70 ton with 2xGR, 2xERLL) has a very similar loadout without ECM and JJs.