This is a SOLO DPS build with the focus on both damage and sustainability. With bullfrog's 15% increase in damage, DTE mods and 12% AR damage, it makes up for dump on full stamina rolls.
For PVP, switch out purple mods for gold firearm mods with stamina attributes.
Bullfrog already reloads fast, so no need for faster reload mods or attributes.
Second weapon is M4 to take full advantage of 12% ar damage instead of rolling another damage weapon modifier you can roll whatever attribute you want.
Self heal perf mods allow to maximize first aid kit heals.