How to remove no4 Mk 1/2 bolt when PH 5c sight is installed.

[TJCNz]

Remove the 5C 'slider' (the vertical adustment) by loosening the retaining screw, press the screw inwards, hold it in & and then slide the arm upwards. Raise the original sight up to the vertical, the bolt should slide out beneath the 'vertical' original sight.

Thanks Alan
Really appreciate your help. I will try that
Cheers