The BTR-4 is an 8×8 wheeled armored personnel carrier (APC) developed in Ukraine, while the T-72 is a Soviet-designed main battle tank. The BTR-4 is designed for transporting infantry and providing fire support, while the T-72 is a heavily armored tank with a primary focus on engaging enemy armored vehicles.
The 30mm 3UBR8 APDS is a type of armor-piercing ammunition designed to penetrate armored targets. APDS rounds typically feature a sub-caliber penetrator, a discarding sabot, and other components. They are known for their high velocity and penetration capabilities.