I wonder if it's the plenum neck feed hole causing it I seen some guy drill it out to 2mm that he said fixed itFx Airguns has released a fix for slow first shots.
There is 5 new pieces: not conical plenum neck (with just 1 oring inside), a delrin ring/insert that go inside that plenum neck and complete new valve housing and oring.
For the M3 the warranty only cover the plenum neck and delrin ring/insert, while for the M4 all the 5 pieces are replaced.
Cannot put photo because the dealer cannot allow.
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