Quickswitching

it kinda hard to quickswitch without making the knife do the draw animation.i use my scroll button on my mouse

yep but make sure you scroll twice or it wont work

Actually, it wouldn't matter what you pick, as long as you prevent the other weapon from showing on your screen.

Gotta double tap it fast, as long as you don't have the draw animation completed, you're fine.

you can quick switch to pistol with Q and go back to sniper its fast for me