The new warehouse smelled of rust, pigeons, and possibility. I stood in the center of the vast, empty hall, broom in hand, looking at the spot Archi had marked on the concrete floor.
"Okay," I said, leaning on the broom. "Before we start digging a fifty-meter hole for a mass driver, we need to talk about the receiver."
"The collector drone," Archi replied. "I have the schematics ready. Solar wings, robotic arms..."
"No," I interrupted. "Think about it. A drone in Low Earth Orbit needs to match velocity with a projectile coming up from Earth at Mach 25. That's a massive energy expenditure. Plus, it's a satellite. People watch satellites. If a piece of 'space junk' starts catching bullets, the Space Force is going to have questions."
Archi was silent for a moment. I could almost hear the processors whirring. "You make a... valid point. Interception in LEO increases our visibility profile by 400%. It is sloppy."
"So, what's the alternative? We can't just shoot blindly."
"Direct Injection," Archi said, the hologram shifting . "We eliminate the middleman. We shoot the cargo directly to the Moon."
I stared at the new blueprint. It looked like an artillery shell, but sleeker. "A smart slug?"
"Precisely. A hardened payload core—our magnets and copper—encased in a thick ablative shell made of cheap polymer and ceramic. Garbage, essentially. We launch it at 11.2 kilometers per second. Escape velocity."
"Archi, if something hits Mach 1, it cracks windows. If something hits Mach 33 inside this building, the shockwave will liquefy my organs and blow the roof off. You can't mask a sonic boom of that magnitude with a 'loud machine'. It's a bomb."
Archi paused. "You are... correct. My initial acoustic dampening model was optimistic. We would indeed alert the entire state of Brandenburg."
"So? Do we build a rocket?"
"No. Rockets are inefficient. We stick to the Mass Driver. But we reuse a trick you've already seen."
"The glider?" I asked, remembering the silver drone that had floated off my roof in Berlin without making a sound. "The one with the anti-friction field?"
"Precisely. The nanites on the glider's hull created a magnetic envelope that repelled air molecules, creating a partial vacuum around the craft. We will scale that up. We will coat every delivery slug in a similar field generator. It will slice through the atmosphere like a hot knife through butter. No friction. No shockwave. No boom."
"Okay, that solves the flight," I nodded. "But what about the launch? To get that speed, the shaft needs to be a vacuum. How do we keep the air out of an open hole in the floor? A mechanical shutter is too slow for a projectile moving that fast."
"We don't use a shutter," Archi said. "We use a containment field."
A new schematic appeared. It showed the muzzle of the gun—the hole in our floor—covered by a faint, shimmering blue film. "An Aerodynamic Containment Shield. It is permeable to solid matter moving at high velocity, but impermeable to gas molecules. It holds the vacuum in the tube, but lets the slug pass through freely."
I stared at the hologram. "You're building a force field? Like in Star Trek?"
"It is a rudimentary version," Archi corrected. "But yes. It will serve as our airlock. This technology will be useful later when we need to dock ships without venting atmosphere. For now, it is the cap on our bottle."
Three Weeks Later
The "Urban Mining" business was officially running. My truck was parked outside, loaded with old MRI scanners and copper wire I had salvaged from a bankrupt clinic. Inside, the Shaft was finished. Fifty meters deep, lined with superconducting coils, and pumped down to a near-perfect vacuum.
"Magazine loaded," Archi reported. A robotic arm slid the first payload—a hardened cylinder of Neodymium magnets—into the breech. The slug hummed slightly, its surface rippling as the nanites activated the friction-dampening field.
"Vacuum pumps?"
"Disengaged. Pressure in the shaft is near zero. Containment shield is active."
I looked at the hole in the floor. There was no lid. Just a faint, wavering distortion in the air, like heat haze over asphalt. The air in the room was still; not a single dust mote was being sucked into the vacuum. The shield was holding.
"That," I whispered, "is the coolest thing I've ever seen. Roof hatch?"
"Open. Trajectory locked. Target: Von Kármán Crater."
"Send it."
THWUMP.
I braced myself for a bang, a crash, anything. Instead, there was just a deep, visceral vibration in the soles of my feet. A sudden thump of displaced mass, like a heavy book falling on a carpet. And then... a shimmer. A silver blur shot up from the floor, passed through the shimmering force field without breaking it, and vanished through the skylight.
There was no fire. No smoke. No shattering of windows. Outside, a split second later, there was a faint whoosh, like a whip cracking in the distance, as the projectile pierced the clouds.
"Telemetry confirms orbit insertion," Archi reported, sounding almost bored. "Velocity: 11.2 km/s. The friction shield held. Atmospheric disturbance was negligible. To the neighbors, it sounded like a car door slamming."
I walked to the edge of the pit and looked down. The blue force field was still there, humming quietly, holding back the vacuum of the gun. "Archi," I grinned. "We just shot a bullet into space from a warehouse in Brandenburg, and the pigeons on the roof didn't even fly away."
"Efficiency is its own reward," Archi replied. "Now reload. We have a reactor to build."