My 38-55 wears the MVA sport tang since it's way easier to use especially in hunting scenarios than a standard knob twister.. I use a Swiss file to notch the staff for my hunting ranges then its simple just loosen the aperture and slide up or down to your range marks...

[Linked Image from i.postimg.cc]

You better be afraid of a ghost!!

"Woody you were baptized in prop wash"..crossfireoops






Woody