incorrect, theres a very rare bug in AA where you can get no recoil, no weapon sound and no muzzle flash yet still fire in the years I played aa it only happened once, on bridge the admin had just forceclassed SVD's and I went to the admin and showed him how my gun was bugged and his exact words where
"lol go own them" which I did... the bugs never replicated itself nor have I tried to replicate it but there is a very small chance of it happening
I've had that once too, I do believe it was in some version of 2.8 though. And for me it was with some sniper as well (I think it was the M82), I couldn't even understand I was firing until the other person died and my mag was empty from pressing the fire button a lot (since M82 has huge recoil, especially without scopes, I was waiting for that so i kept pressing fire).