Dumped everything to FA to take advantage of the damage bonus for every 3000 firearms offered by the set bonus. Running a Covert SRS, as it has the rolls that works. Determined is useful for getting your ultimate back.
M700C with a great setup of talents (it's literally a god roll).
Both weapons are optimized for crit hits with Disciplined, so all attachments are CHD and armor rolls.
This build is great for teamwork during missions with long sight lines/elevated. The main problem for HF is sustain, but if you are careful, you can solo most activities in the game. Life Support lunchbox for revives. Can be replaced with any other healing skill for soloing. During Ambush, I saw 4.6 million crits with headshots (giving you enough stopping power to one-shot most NPCs at full stack).