Sniper. 1 aimed Sniper rifle shot per turn, going for high damage and critical hits, low on HP and suvivability, but at long range good for PVP:5 9 4 1 6 6 10, traits small frame and good natured (or finesse for cripple build)Awareness. All more crit perks and better crit perks, livegiver, maybe sharpshooter.
Mauser is a pistol and it has an aimed capablity. Though if you got the Fast Shot trait(don't tell me you did, otherwise you fucked up your build totally), it won't be possible for any weapon.