Gehmann 18mm Front Iris 2.4-4.4
Gehmann 18mm Front Iris 2.4-4.4, Gehmann 18mm Front Iris 2 4-4 4 This front iris fits the 18mm front sight and adjusts from 2 4 to 4 4 with just an easy turn Adjustment helps when there are light changes, sight radius changes between positions, or aperture preference changes