Cartridge case deflector lets easy Procedure in each suitable and left handed shooting positions for greater tactical applications The modified near array aperture (fifty meters) for the Colt 9mm SMG is engaged. Here is the normal aperture for the SMG but a protracted range aperture is usually flipped in place. https://emilioqdncl.ampedpages.com/the-5-second-trick-for-colt-smg-upper-54211108