Jet sqelcher becuase it is SOO OP
But seriously, folks....
As cool as it would be to write primers for every weapon in the game, most (sane) people would say this is a somewhat unobtainable goal.
There are a lot of weapons in the game, and a lot (if not all) of them are difficult to use to a high enough level to write a quality primer - basically you'll be stuck with suboptimal play on a bunch of different weapons and a bunch of sucky primers :/
If I were you, I would get really good with one or two weapons that you enjoy playing and have an in-depth understanding of, and write quality, detailed primers for instead.
Hope this helps :)