Earlier versions had problems with the lighter barrels overheating.
light machine gun is the m249 a medium machine gun is the m240 and the heavy machine gun is the browning m2 50. cal machine gun
The highest caliber machine gun in standard use is the .50 Cal. Gatling guns are used in 20mm caliber. XXXXXXXXX Russia and China use a heavy machine gun larger than the .50 cal BMG- it is the Vladmirov KDV (for the Russians), in caliber 14.5mm x 115.
The 60 cal. has a bigger barrel.
A Browning M2 Heavy Machine gun with a 66418 serial would have been manufactured around 1958. Over 3 million M2 .50 cal machine guns have been manufactured.
On the top of the turret it had one browning m2 50. cal machine gun in the turret it had one 75mm tank gun and one browning 30. cal machine gun and in the body it had another browning 30. cal machine gun
Villars Pedarosa
Yes and no. Some machine guns are heavy and some are not. It depends on which type of machine gun.
If you are referring to the present, today's most powerful sub-machine gun is the H&K UMP .45 cal sub-machine gun, or the Kriss Vector SMG. if you are referring to the past however then its undeniably the Tommy Gun. also a .45 cal sub-machine gun.
John Moses Browning
The main infantry weapons used by US Forces were :- Colt M1911 pistol M1 Garand Rifle M1 Carbine M1903 Springfield Rifle M1 Thompson Sub-machine gun M3 Grease gun M1918 Browning Auto Rifle M1917 medium Machine gun M1919 Machine gun M2 .50 cal Heavy Machine gun
50-100
7400 meters.