700-1200 rpm.
The M249 is an automatic light machine gun. This gun uses 5.56 mm ammunition. It is gas operated and air cooled. It has a quick change barrel. It can support a bi-pod attachment, allowing a boost in the already accurate rate of fire the gun possess.
The M249 Squad Automatic Weapon fires the same 5.56x45mm cartridge used by the M16 and M4.
The maximum effective range of the M249 light machine gun is 1,000 yards (910 meters).
FN Herstal
CLP
Technically the PKM, since it is an AK-47 variant it fires a 7.62mm round while the M249 shoots a smaller 5.56mm round
In short the M249 is effective up to 1000 meters to cover an area target which the gun is designed to do.
In the US military, you'd probably be referring to a squad's Automatic Rifleman, who carries the M249 SAW. Each fire team in an infantry squad has one, and their role is suppressive and supporting fire, particularly to lay down covering fire while the other fire team bounds, flanks around, or moves otherwise.
Yes
360 FPS
The M249 is not a rifle - it is a light/general purpose machine gun, also commonly referred to as a SAW (Squad Automatic Weapon). Informally, it's sometimes referred to as the 'piglet'.
700-950 a minute