Recently had my diadem apart for a full rebuild. When I took the valve out it looked the same as the sentinel and ad the same flat side on the valve pin and the same hole in the valve that would aid with a blowback recock. Just found it odd that a FASOR type marker would have these. I can understand using the same parts to save money, but it just dosnt make sense when the whole point of a FASOR is using spring return to get the bolt back.
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