What they are saying is to install the front ring base forward enough so that it doesn't cover the ejection port.

This photo shows my Sako with the (wrong) front base that came with it. Notice how it overhangs the port.

[Linked Image]

http://www.sako.fi/pdf/specs/Optilockbase.pdf
http://www.sako.fi/pdf/specs/Optilockring.pdf


"There's more to optics than meets the eye."--anon

"...most of us would be better off losing half a pound around the waist than half a pound on our rifle."--dhg