Airsoft support guns, big, heavy, cumbersome and a whole lot of fun, Airsoft groups always benefit from having a airsoft LMG around. The sight of a player holding ground with a fully stacked M249 while screaming bloody murder is about as fun as things will get.
A light machine gun (LMG) is a light-weight machine gun designed to be operated by a single infantryman, with or without an assistant, as an infantry support weapon. LMGs firing cartridges of the same calibre as the other riflemen of the same combat unit are often referred to as squad automatic weapons.
Often over looked due to the bulk of them, There's a host of great airsoft rifles out that filing the LMG position including M249, Mk1, Mk2 and the Para. The Stoner, RPK and others.