New 10/22 owner ??

I just bought my first 10/22. It is a model K10/22-22 From Wal-Mart. Stainless 22" barrel. I am not very impressed with the fit and finish of the bolt and inside of the receiver. There are a lot of
machining marks and rough edges and rough finish on the interior of the receiver along the bolt guides or rails and the ejection port. Is this Normal? Does Wal-Mart get seconds from Ruger? Or am I just being too critical. I have not fired it yet but it does cycle a full mag just fine. The out side of the receiver is excellent. It almost looks like Ruger didn't finish the manufacturing
process.

Thanks, Bradley in Ca.