Go here for all Romy AK all the time;
Look for the link within discussing "cant".
Also - have Cabela's ship it back to Century for you, as I have had Dunham's do for me several times. No need to ship on your nickel when the store should be doing so on your behalf.
If YOU do decide to ship on your own to Cent, contact Cent for an RMA and ship it on your own via common carrier. These are legal repair shipments under ATF.
When repaired, Cent can legally ship the repaired gun right back to your own front door (assuming you live in a Free America state...). I have also done this. Always a treat to come home and find that UPS has dropped off an AK!