The difference is the hood of the front sight.
Going on the photos, one appears to be able to adjust elevation without tools by wat of the little knurled nut, while the other appears to require the standard A2 sight tool to adjust.
The difference is the hood of the front sight.
Going on the photos, one appears to be able to adjust elevation without tools by wat of the little knurled nut, while the other appears to require the standard A2 sight tool to adjust.