The M150/M151 Mortar Fire Control System - Dismounted, or MFCS-D, provides mortarmen with increased speed and effectiveness previously only available to the mounted mortar systems using fire control.

You mix some up, lay a few bricks, and let them sit for a month. At the end of the wait period you do a light acid wash on the mortar to replicate what takes Mother Nature 30 years to accomplish.