Just a theory...
This is just what I can come up with to explain the situation, but I haven't proved it. I would bet that it doesn't fire in electronic mode when it's sat for awhile on the first pull because the sear is pulled down and then returned back faster than if you were to pull it manually. I think there's enough stiction there that it takes it a split second longer for the pressure pushing on the bolt to overcome that stiction and fire the bolt. With about a 30ms dwell time (time that the solenoid holds down the sear) it's down and back up quicker than if you were to pull it manually. That's the how I can explain what's going on.
Polishing the piston, using KC oil and getting the loosest carrier o-ring fit will eliminate the problem.
This is just what I can come up with to explain the situation, but I haven't proved it. I would bet that it doesn't fire in electronic mode when it's sat for awhile on the first pull because the sear is pulled down and then returned back faster than if you were to pull it manually. I think there's enough stiction there that it takes it a split second longer for the pressure pushing on the bolt to overcome that stiction and fire the bolt. With about a 30ms dwell time (time that the solenoid holds down the sear) it's down and back up quicker than if you were to pull it manually. That's the how I can explain what's going on.
Polishing the piston, using KC oil and getting the loosest carrier o-ring fit will eliminate the problem.


Stock class: Skillz conquer every time!
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