I bought a new Inland Carbine about 3 weeks ago, SN 1792. I have put less than 100 rounds thru it. After having a few issues with it, I stripped it down and found the following:

The gas block nut was loose by about 3/4 of a turn or more. Is that something I can fix, since Inland doesn't seem to want to do it?
The back of the bolt is starting to peen over, as is the hammer.
The right locking lug is starting to peen.
It appears that the bolt, when cycling, is scraping the top inside of the receiver, scratching the bolt and leaving shiny marks inside the top of the receiver.
The R/H bolt guide rail is very rough, very deep valleys.
It also appears that the bolt is hitting the R/H magazine feed lip when cycling.

I bought the Inland because I assumed they would uphold the quality of the name when owned by GM. To say that I am very deeply disappointed is a significant understatement, as I have wanted an M1Carbine since I was 14 years old. (Many, many years ago.). But this too, shall pass.

I'm going to call Inland tomorrow and see what can be done. I'll try to keep this thread informed as to the proceedings.

Thanks again for all the info you all have provided. It has been invaluable.