Find out how to get Chopper Light machine gun in Call of Duty Mobile for free here.
In order to unlock Chopper LMG you need to complete in K/D Critical event which involve in playing a lot of multiplayer matches to get medals.
There are 4 tasks that you need to complete K/D Crtical event such as:
1. Earn Double Kills Medal 8 Times
Hop into any game mode of multiplayer match and kill 2 enemies withtin a short time of one another to get Double kills medal.
Medal require: 8
2. Earn Triple Kills Medal 5 Times
Kill 3 enemies withtin a short time of one another to get Triple kills medal. Applied to any game mode in mp.
Medal require: 5
3. Earn Survival Medal 3 Times
Killed an enemy when you were severly injured (low health kill). Your Health should be below 25% when killing an enemies.
Medal require: 3
4. Earn 200 Medals in MP Matches
The last step to unlock Chopper LMG is to earn 200 medals in any gamemode of multiplayer matches.
In conclusion, To get Chopper LMG in Call of Duty Mobile you will need to play a lot of multiplayer matches and get a lot of medals.