About the M1/M2 Carbine:
Despite being in demand, very few M2 carbines saw use during World War II (entered service on October 1944 in Europe) , and then mostly in the closing days against Japan. The M2 carbine was logistically compatible with the millions of M1 carbines in U.S. service, and offered longer range, better accuracy and better penetration than (pistol caliber) submachine guns like the Thompsons and Grease Guns. Therefore, after World War II, the M2 carbine largely replaced the submachine-guns in U.S. service, until it was itself replaced by the M16 rifle.
H&G is right about the M1/M2 Carbine being in the game.
The people that call for the Nerfing or Removal of any vehicle or weapons either can't learn and adapt or they want all the POWER and ADVANTAGES in their favor.