Gehmann 579-I Lens Adaptor for Rearsight Irises Size:I making Hornady unprimed brass a

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Gehmann 579-I Lens Adaptor for Rearsight Irises Size:I making Hornady unprimed brass aThe Gehmann 579 I is a small precision adaptor that lets you fit Gehmann's 579 cylindrical lens system onto a compatible rearsight iris, rather than buying a whole new iris unit. It is internally threaded to pick up your existing iris's own front thread, so the 579 lens locks straight onto the sight you already use. The 579 I variant is matched specifically to the 566, 566 R, 566 S, 567, 570, 570 R and PH570 irises check your iris model before