Both had their issues, and in another world history, they failed to shine as their designers had envisioned. However, after going through Li Lin's improvements, combining the two had turned them into a terrifyingly powerful weapon.
The 28mm cylindrical aluminum projectile was accelerated by the progressively ignited high-temperature gases as it traveled through the barrel, its diameter reducing continuously until, upon leaving the muzzle, it became a 20mm shell with an initial muzzle velocity of Mach 30. In the face of such a dread round, even armored fortresses would crumble. The only flaw—lack of mobility, with no suitable platform for deployment—was also creatively solved through the combination of Golem Maid and motorcycle.
"This weapon isn't very humane, is it?"