First choose your gun you are best with, often a gun you have a high gun level with.
Now if you have just prestiged choose the gun you were best with and either:
- Unlock it with your prestige token
- Or if it is already unlocked, without tokens, use your token to your advantage.

Now choose your attachment, if you use two - that's fine.
If you haven't unlocked your attachment, keep playing until you do.
Once you have done this you have most of your gun done.

For your proficiency you want something that is useful - if you use attachments, no need to read this bit.
Some of the most useful our:
- Range
- Focus
- Stability
- Damage
- Speed
If you don't have your one, keep working for it.

If you are a rusher, a camper or what ever - you are going to need the right perks.
If you are camping you will need things like Dead Silence and Assassin our useful.
Though if you die lots by kill-streaks you need Blind Eye so find the perks you find useful.

For your secondary's machine pistols have great effect as for handguns they have little effect - as for launchers like Stinger and Javelin aren't going to help if you run out of ammo.

Tactical grenades like flash's and concussion's can save you if you need to get away but if you are spawn-trapping you might want Tactical Insertion's though Portable Radar's are helpful in most cases.

If you die lots you will still want kill-streaks - right. Then you could do with Support, but if you can get like 7 - 9 kills, without deaths, you will want Assault. That leaves Specialist, this is BRILLIANT if you are going for M.O.A.B but soon as you get 8 kills you get all specialist bonus - this gives you ALL the perks in the game. You receive Specialist Bonus which is +100 XP a kill.