Take the stock off and see if the receiver extension is silver. If it’s black, it’s a Cerakote model. The box should have a sticker with a model code like below;
11711 - Np3 model.
11794 or 11795 Cerakote model.
I’d still lean towards a fire control issue causing the problem. I troubleshot one doing this a few years ago. If I recall, the trigger was the out of spec part. If it was the Benelli Click issue, he would hear the hammer fall when pressing the trigger and no shot would be fired since the hammer would already be lowered against the back of the bolt carrier. There might be light primer strikes on the chambered round, but not always.
Also note the aftermarket handguard installation. If not properly fitted, this can cause the barrel to be out of battery slightly. The easiest way to check this is to inspect where the seat ring is on the barrel. This ring seats against the face of the receiver. If there is any gap, something isn’t right.
This is assuming I read his diagnostics correctly.