What is the barrel length of the .50 cal?

The .50 caliber rifle, particularly the M2 Browning machine gun, typically has a barrel length of around 45 inches. This length is favored for a number of reasons, including accuracy and stability over long distances, as well as the ability to generate the necessary velocity for the .50 caliber projectile. The longer barrel allows for a more complete combustion of the propellant, maximizing the energy transferred to the bullet, leading to enhanced range and effectiveness.

The options representing shorter barrel lengths do not align with the standard specifications for the .50 caliber weapon systems widely used, which is why they are not accurate in this context. A 20-inch barrel would be too short for the .50 caliber’s operational needs, and both 30 and 60 inches do not correspond with the established standards for this caliber. Therefore, the selection of 45 inches as the barrel length reflects the recognized capabilities and configurations of the .50 caliber weapon systems.