I intend to purchase a pulsar f455. Which clip can I buy for a sight with an outer diameter of 50.9mm? Thank you very much,Best regards
If you have an outer objective diameter of 50.9 mm, a 51mm adapter will fit perfectly.
You need an adapter:
https://www.optics-trade.eu/en/smartclip-adapter-a.html (size: 51 mm)
and a reduction ring (converter) for F455: