John Browning’s .50 will ventilate lots of things, and take down concrete block walls. Who wants some? Come get some! And 20/30mm cannon are lots bigger logistically than M2’s... JMHCO, ;)
I was a weapons platoon gunner and when compared to small arms at the company level the M2-HB .50 is the big hitter.
But the first time you see cannon-caliber munitions being used, the .50 cal seems like a Red Ryder BB gun.
This chain gun is a good switch for the HMMWV armament upgrade.