This is the Assault Cannon for my Space Marine Land Speeder from Warhammer 40,000. Its almost done :), I like to tinker with it every now and then and add more detail. The landspeeder itself is still about 60% complete. Assaut Cannons fire Bolt Shells. Bolts are self propelled, explosive warheads, think miniaturized automatic grenade launcher or mini rocket launcher. I actually calculated the caliber of the rounds, and they are measured to exact milimeters, the gun technically works. Its mounted underneath the land speeders forward section on an articulated mount. A Land Speeder is a Fast Attack/Recon Skimmer or hover vehicle. 2 person Crew in full armor, twin turbines powering this little package of destruction. And this model is usable in Shape 2.0 :)