The development of XM907E2 cannon of ERCA utilizing 155mm/58-caliber XM282 Advanced Armament System (AAS) for Howitzer Improvement Program (HIP), which features larger 1700 cubic inches (28-liter) chamber capacity than XM297E2 (1400 cubic inches). pic.twitter.com/UiJdgwmCnm

— Ronkainen (@ronkainen7k15) May 23, 2022