Any chance your op rod spring guide has been fitted upside down and your mags aren't secured properly? I had better be more specific.
First, I realize the guide bump is there to make it goof proof, but I've seen guys who are too quick to grind something off rather than turn a part around and try to place it in a different order or direction.
Second, we hear many, possibly misinformed, complaints about the quality of these guns. We don't know how automated the plant is. The OP's part may have been stamped wrong at the factory. It is possible that the stock flat spring guides are punch pressed in two separate operations, the long oval holes first, then the single angled pin hole later. This could even be done at a separate machine by a different operator and fed in backwards. I know, it seems far fetched but Russian workers are famous for their vodka intake. Who knows what the Chinese workers do. My 305 passed inspection with the front sight screw missing!
And yes, CanAmmo is taking care of it. Good luck to the OP in getting the rifle working.