During WW ll, we dropped ten of thousands of single-shot .45 pistols all over for the Resistance to use to procure more effective weapons by killing an enemy combatant and taking their 98K or MP40. These pistols were cheap, short-barreled one shot weapons but could be reloaded a couple times with the spare ammunition stored inside the grip. FP-45 Liberator - Wikipedia, the free encyclopedia The suggested use was to firmly press the weapon against the abdomen of your intended victim just below the sternum and fire.. The hot expanding gases would be contained inside the body, effectively silencing the weapon and the gas would also majorly disrupt the organs inside causing near instant death. Just a reminder that if we are ever subjected to firearms confiscations and martial law, a simple single shot weapon can be improvised from pretty much any hardware store for a few dollars.