This could have been shortened:

For example bind A "+fire 6" (fires LG as long as you keep the button pressed).

Yeah you're right. I got the binds from a 14 year old post on an archived version of a long defunct website. Guess it's outdated.

At a minimum you need bind mouse1 "weapon 5; wait 2; +attack"

I'll edit the OP.

You don't even need to bind switching weapons anymore, +fire (number) makes weapon (number) followed by +attack obsolete. Instant firing with the right weapon.

Ah got it. Well it seems this thread was a large waste of time.

NO.