We are aware of the issue that occurs in Fireteam. We are sorry for the inconvienence this issue had caused.
We are providing you with a quick fix to avoid the issue.
Quick Fix: Before starting any Fireteam match, Change your Primary Weapon everytime you start a match.
If you encounter any more issues, Please do send us a Customer Support Ticket.
Thank you for the continuous support for Combat Arms: Reloaded.