Here is a M249 SAW (Squad Automatic Weapon) that fires at a rate that can be adjusted between 600 to 1200 rounds per minute.
The M249 fires a 5.56 vs the M240 that fires a 7.62 round.
https://www.youtube.com/watch?v=MIPvPRWFd9A&app=desktop
No belt links anywhere. Not an M249 in firing position #1, #2 or #3. Especially #1, and really especially #2 or #3.
Is the M249 the FN “Minimi” ?