BLAST ZONE China’s military unveils first test of ‘world’s most powerful gun’ with Sci-fi weapon that can launch shells at 2,200mph CHINA'S military is testing the "world's most powerful gun" that can launch shells at an incredible speed of 2,200mph. The futuristic Sci-fi weapon can reportedly fire a missile-size projectile within seconds as it paves a path for more accurate and catastrophic attacks. 3 The technology uses energised coils to create a magnetic field that propels the projectile forward at rapid speeds The Chinese navy is reportedly testing the planet's most powerful coil gun which includes a giant electromagnetic launcher….