The Glock 19 Gen4 MOS is among the preferred compact entire-dimension-body pistols for day to day carry, home protection, and Qualified use. In the event you’re trying to find Glock 19 Gen 4 available for purchase, Glock 19 MOS gen 4, or variations like g19 gen four mos, this article will make it easier to understand what helps make the Gen4 MOS