Agency Arms Magwell, Black, Fits Glock 19 Gen 5 MW-G19G5-DTY-NBS-B The Agency Arms magwell was designed specifically for duty/combat usage. It has a streamline design which positions the hand up higher into the firearm and offers an increased funnel vs their EDC Magwell. Their magwells are not universal fit, they are designed to work with the installed backstrap (if any).