K31 Swiss vs. 96 Swedish

[Pattern14]

A link:

http://www.swissrifles.com/~swiss-sights/

Shows both a permanent and a clamp-on model.

Clamp on available at Grafs and Sons: Graf Sons - SWISS PRODUCTS K-31 CLAMP -ON MOUNT ALUM. w/o RINGS

Drill and Tap: Graf TAP MOUNT