I think that rail gun technology will work.Rail Guns also has military applications for space warfare. The theory has been around for over 100 years.In 1918, French inventor Louis Octave Fauchon-Villeplee invented an electric cannon which has a strong resemblance to the linear motor.In WWII,an electric anti-aircraft gun was proposed.In late 1944 enough theory had been worked out to allow the Luftwaffe’s Flak Command to issue a specifications for the gun.
I'm completely sure that it will. In fact Bull's own research got shells up to 180 km in the atmosphere, just 20 km more and that's basically outer space.
That's true, but the Germans also found that energizing such a gun required a huge city-scale power station and was therefore technologically unfeasible. The captured project files were sent to the Dahlgren Naval Proving Ground after the war where Navy scientists looked at the concept again in the late 1940s but confirmed the German's findings. After HARP, the ballistics scientists at Dahlgren once again reviewed electric guns in the mid-1970s but again found that the technology was not there yet.