from what I understood the eastside norman walmart stopped selling guns because of problems keeping an ffl holder employed and the paper work strait.
way back when the old west side norman walmart was closing down and moving to their present location they were clearencing overstock rifles/shotguns out, so the $135+tax rem 870s express magnums were too good of deal to pass on, so I bought one, didn't even bother looking in the box, but a couple of days later I went to put the barrel on and shoot it and damned if it wasn't a 20ga in a 12ga box.
called them up and they said bring it back and they'd get it straitened out, got back up there and they couldn't match a 12ga 870 to the serial number they'd put on the 4473 that was filled out for my purchase, so they got another 12ga, filled out another 4473 correctly and off I went.
the next time I bought a rifle at the "new" present location westside store they had a doublecheck template that overlaid the 4473 that the mod checked, if any info didn't show up in the correct location or was incorrect the 4473 was rejected and the sale stopped.
I asked when they started doing this and the mgr told me when the atf man said any further paperwork incidents would be considered as intentional.
had a ffl I used for transfers/shippments down south tell me the atf man had a simular conversation with him, he did a damn thorough check, double check, triple check of the 4473 before he'd even call in for the background check.