We do not believe this issue is due to the plugging of the magazine as all of the mossberg 930's we have brought into Canada (approx 300 units) were plugged the same and we have only had a few customers with this or a similar issue. In addition Mossberg has had a few issues with these guns in the USA that are not plugged. AFAIK, but I will have to confirm with Jason, your gun is going back to the US for warranty work.
Steve
Steve
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