Ultra High Speed Gas Gun

Two Stage gas guns use gunpowder, the first stage, and highly compressed hydrogen, the second stage, to accelerate projectiles at high velocities.
The first stage uses conventional smokeless gunpowder as its propellant and works the same way as firing a bullet from a gun. The second-stage propellant uses a highly compressible light gas such as hydrogen. Since light gases have very low molecular weights, they are easily compressed to the high pressures needed to efficiently launch projectiles at hypervelocity speeds.

DBM two-stage light-gas guns allow you to test the behavior of your materials and structures at very high impact. This two-stage light gas guns are the only practical devices for launching projectiles at velocities over 2,500 m/s in IRAN.