This is a special order item. Allow at least 2 months for delivery.  
This ships free when ordered with a March Scope. Shipping fee added if ordered alone. 

MD Disks

• MD Disk help to reduce the amount of light coming into a scope by up to 50%, depending on the conditions. This light reduction increases the scopes depth of field and, prehaps more impotantly for competition shooters, reduces the amount of seen mirage. Using a MD Disk at 60 or 80 power gives you a competitive advantage when the conditions turn bad and lets you see the target better than your competitor.
  Weight : 0.25 oz (7.1 g)

  DB269-0For 56mm objective models
  With MD disk attached,the inner diameter will be 43mm

  DB062-0For 52mm objective models
  With MD disk attached,the inner diameter will be 35mm

  DB740-0For 42mm objective models
  With MD disk attached,the inner diameter will be 30 mm

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