My newly acquired FWB 300S came disassembled. Seem to be having the same problem as this fellow
http://ttorg.targettalk.net/viewtopic.p ... 1&p=147055
did with the rear sight moving back and forth slightly... deleted.
Figured it out. Just not using enough force to turn knob as stated in link above.
Jim
Rear Sights FWB 300
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