dmr, plasma grenade, sword, grav hammer, i dont use a wide variety of weapons. im working on master for shotgun, and magnum. if you count flag kills and splatters as weapons then ive mastered those as well
Mastered? None. But I'm pretty good with a few different handguns and 5.56/.223 rifles. Like most, I shoot 9mm more accurately than larger calibers, but still do well w/ others. Still wouldn't say I mastered them, though.
Also, when I was younger, was very proficient with knives. I haven't practiced in years, though. *shrug*