The M3 has been around since the 1940s. It was used in fighter aircraft, they needed a higher ROF to engage other aircraft and the M3 provided that. While there may have been some tweaks, this is still a heavily Browning M2-based HMG.
Fisher developed it on his own dime. Floating graphite is dangerous in an all-oxygen environment with a bunch of electrical circuits around. It could cause a short, followed shortly by a fire (e.g., Apollo 1). Pencils are dangerous in zero-g.
The problem with the M2 in combat was not the lack of penetration, it was the lack of power compared to the M1 Garand. The .30 Carbine round has a bullet essentially the same diameter as the .30-06 the Garand used, but lighter at 110gr vs. 150gr, and slower at 1900fps vs. 2700fps. To a large ex...
@mychavey The .50 BMG round was never designed to be an antipersonnel round the way the .338 Lapua the British use was. The .50 BMG loses nothing in terms of power because of gas operation, it loses accuracy over extremely long range because of cartridge and projectile design issues compared to ...
The M3 has been around since the 1940s. It was used in fighter aircraft, they needed a higher ROF to engage other aircraft and the M3 provided that. While there may have been some tweaks, this is still a heavily Browning M2-based HMG.