FAB Defense Top Mounted Deployable Rear Sight Flat Dark Earth FX-RBST. FAB Defense designed these AR 15 Parts with ergonomic angel-wing-shaped shrouds that help center the image with any front sight so that you can accurately use these in...
FAB Defense Top Mounted Deployable Rear Sight Flat Dark Earth FX-RBST. FAB Defense designed these AR 15 Parts with ergonomic angel-wing-shaped shrouds that help center the image with any front sight so that you can accurately use these in...