“The 2A28 Grom is a 73mm, smoothbore, semi-auto gun that fires the same RPG-style ammunition used in the Soviet-built SPG-9 recoilless gun,” defensetech.org explains. “While its rounds can pierce armor up to 11 inches thick, it’s not very accurate. Its max effective range is about 700 meters. However, its got only a 70-percent chance of hitting a target at a range of 500 meters. That goes down to a 50-percent hit rate at 800 meters when the gun is firing from a still position with no wind. I’m not even sure what the unstabilized gun’s accuracy is when it’s fired from a moving vehicle.”