Hello Dear Abdo, Son of Jah here, Just because I have a good sensitivity and a good gaming mouse it doesn't meant that doesn't necessarily mean that I do aimlock or anything M4 and precise aim is more about good practice over a period of time and I have been playing this game since years. Also if you would stand and shoot it makes easier for the opponent to take a headshot moreover people were calling you hacker but that doesn't necessarily mean you hack right? Anyways I knew that people will come over and cry for me ainlocking so I pre record the video of my gameplay I'll share you the link
https://www.youtube.com/watch?v=vnycbHYIHpQ I made like 17 kills with m4, This is the video where I made most of m4 headshots, Also the full video of 8 mins I will send it below watch both the videos at 1080 P for proper quality. Thank you