how in the world are you comparing a rifle as a replacement to a pistol??
The .45 was created because the .38 was not powerful to knock down Moros in the PI
The Springfield A3.03 was the weapon of choice from WWI to WWII, being used effectively by the Marines in the first 2 years of the war
Claiming that a carbine was a replacement for a pistol??
Then why did tankers carry pistols and why did officers carry pistols??
Rick Jason carried a carbine.
Tankers also had the grease gun which was same ammo as the 45.Made perfect sense. The only thing that will replace a 45 is another 45.Never a need for a double tap... ever.
Tankers only carried pistols if they bought their own. Most did.