Apex Legends guns not working mid-fight

Hey,

So I have Havoc.
Team Pushed 

2 Knocks 1 mirage alive ( while other team pushing so we had to wipe this squad and armor swap )

I saw mirage rev his teammate so i hold my right click for ADS with havoc and then left click to shoot with havoc but it didnt shoot ( i thought it might be my mouse issue tho this mouse is GOOD AND Costly THERE IS NO WAY THE MOUSE IS THE ISSUE SO DONT POINT THIS IS MY MOUSE ISSUE ) i swaped the gun spitfire i hold my right click for ADS with havoc and then left click to shoot now i was able to shoot but my gun went on reload AND THEN I SWITCHED TO HAVOC i hold my right click for ADS with havoc and then left click to shoot AND FOR GOD SAKE IT DIDN't SHOOT AT ALL ( HE REV both of his teammate i got knocked my team got killed )