While this appears to the uninitiated to be rather strange, a glance through the cfg for each weapon will reveal that appearances can be deceptive. Almost every weapon in BDA that does not share ammo with another equal caliber weapon, has a unique cfg value applied to it, In the case of the Abrams the shell weighs ☀8.35e-3 t or 0.00835 t or 8.35 kg with a muzzle velocity of 1650ms and the aforementioned M102 Howitzer shells are 14 kg in weight and have muzzle speed of 494ms, this is of course neglecting the blast damage radius and heat damage difference. The Abrams is considerably more powerful than the M102 howitzer, which is just as it should be.
Bahamuto Dynamics in Real Life Edit
The Abrams tank entered service in 1980, and is considered one of the most effective main battle tanks on the field today. With three variants (M1, M1A1, M1A2) the tank is sure to see much more service in the coming years.
Originally M1 Abrams turret comes with a built-in 7.62mm M240 coaxial machine gun.