Modifying MBUS sights

[Clark_Kent_X]

does anyone know if you can put the XS sight post and ghost ring on the MBUS sighs?

[P.W.]

No you can't, since they are injected molded plastic they are out of spec. A friend works @ XS & has already confirmed that their Paul Howe CSAT which is just a regular Mil spec A2 Apeture w/ a Notch style sight @ the 12 O'Clock would not fit. This was the verdict on their remaining sights as well.