This is a build focused on Critical Headshots. Such a build is particually well suited for the [Vectis Prime], due to its 60% Headshot Damage increase on max zoom.

The two Galvanized mods provide the largest possible stat increase for multishot and crit chance if their conditions are met. This can make it a little bit difficult the get the first kill in a high level mission, but the increase is definetly worth it.

Primary Deadhead provides a 120% Damage increase which stacks up to 3 times aas well as an additional 30% Headshot Multiplier.
With the 60% Multiplier from Target Aquired, the [Vectis Prime] has a Headshot Multiplier of 150% on max zoom,
and 130% on normal zoom.

The Sniper Ammo Mutation is needed in order to not run out of ammo on longer missions as the Sniper Ammo that is dropped by enemies might not always be enough.