My hexotic build that I use in 1.8.3. Pretty powerful with little sustain so requires your movement and aim to be pretty good. But its a fun build to switch too if you feel like running non-meta.
Instead of running vigorous chest piece you could run barrets. Personally I like popping my booster shot at the start of the fight giving me that full overheal. It should be noted that if playing with a healer run vigorous as the overheal saves your life quite a bit.
I personally run the smg version because I'm a noob, but all you need to do is roll the gloves to assualt rifle damage and keep the m4 the same (but play around with the talents as you wish).
Instead of having classified kneepads you can run shortbow championship ones, but I personally like throwing the nade on the floor infront or on me to use the fuse time to catch the player in the nade, with shortbows I practically nade myself which is embarassing.
This build can be ran anywhere (DZ, Laststand and Skirmish) and is strictly for pvp.
Most builds and cheesy builds like predators will deal a lot of dmg due to the low sustain so keep that in mind (also dont use this build if you lag or are playing on non-native servers)
Thats all, thanks for viewing my build :D
If there are any problems with it or something does not add up leave it in the comments.