The Glock 19 Gen4 MOS is one of the most well-liked compact complete-sizing-frame pistols for every day have, house protection, and Experienced use. Should you’re attempting to find Glock 19 Gen 4 available for purchase, Glock 19 MOS gen 4, or versions like g19 gen four mos, this article will enable you to comprehend what makes the Gen4 MOS desig