M242 25mm Bushmaster chain guns on Light Armored Vehicles 25 during a crew-served gunnery range at Camp Schwab, Okinawa, Japan

*No one wants to hear it but the 25mm chaingun on the Bradley's the Ukrainians have been given have proven to be quite effective against Russian armor up to and including their MBTs. I don't know how we want to classify the upcoming US Army 50mm cannon on their new IFV but it should be a game changer. Having said that I have to wonder if 30mm isn't the sweet spot as a do everything type weapon system. It would appear to be effective in the anti-air, anti-armor, anti-fortification and with airburst can provide infantry support. Could it be that if we're still looking to be "expeditionary" that 50mm is as big as we need to go? Even then on only a few select vehicles? Imagine an Abrams hull with a 50mm unmanned turret? Heavy tank protection for the crew moved to the hull with a gun big enough to handle most everything and a few missiles to get what it can't.

#Marines zero M242 25mm Bushmaster chain guns on Light Armored Vehicles 25 during a crew-served gunnery range at Camp Schwab, Okinawa, Japan, Aug. 26, 2024. pic.twitter.com/61wnKskwKv

— III MEF Marines (@IIIMEF) September 9, 2024