Being known as the big pineapple machine gun by the players, it is also very popular in reality

Many military equipment can not be seen in reality, but in the game can be glimpsed, for example, this U.S. M249 squad automatic weapon machine gun, which is particularly high in damage, and therefore has become a killer app for the gamers, and is known by the players as the "Big Pineapple". This machine gun is not only popular in the game, in reality is also favored by many soldiers, this machine gun in 1984 officially became the U.S. Army's three armed forces standardized squad machine gun, but also the most durable continuous firepower in the infantry squad.

The M249 utilizes a pneumatic, air-cooled barrel that can be changed quickly so that the machine gunner doesn't have to waste time repairing the barrel when it malfunctions or overheats. The M249 is equipped with a folding bipod underneath the bollard to facilitate the deployment of spot-fire support, as well as fixed tripods and vehicle mounts. The M249 is supplied with a chain-link and STANAG magazines, allowing the machine gunner to borrow magazines from other soldiers equipped with M16s or M4s in case of emergency, such as when he is out of ammo.

In addition, the M249 light machine gun is a gas-guided automatic weapon with a rotary locking mechanism, and the chain feed mechanism is a scaled-down version of the MAG machine gun feed mechanism. Therefore, this machine gun can be used both for chain feeding, and can be used for magazine feeding of American Colt AR15 or M16 rifles, and there are three types of ammunition feeding methods: sagging chain feeding, chain box feeding and magazine feeding, which is unique among machine guns.

Below the transfer guide on the left side of the magazine with a magazine slot, but in the subsequent Minimi for the U.S. Navy Special Forces for the gas-guided automatic weapons, open chamber to be struck in a way that allows the chamber to rapidly dissipate heat to prevent spontaneous combustion of the rounds, the gas-guided hoops have a rotary gas regulator, which is based on the MAG machine gun's gas regulator developed.

There are three adjustable positions: one for normal use, which can limit the rate of fire so as not to consume too much ammunition, and one position for use in complex meteorological conditions, which reduces the failure rate by increasing the gas flow in the gas-guide tube, but the rate of fire will be increased; and the other position is for launching rifle grenades.