This probably doesn’t need to be said, but just in case. Stay away from Century AK’s, if you have one invest in at a minimum a field headspace gauge in the caliber your is chambered in and ensure your rifle has proper headspace.
Ideally have it examined by an AK armorer or highly competent Smith that has extensive time working with the AK series.
https://youtu.be/4aIP4yZOcWU
https://youtu.be/DJB9x2IPx8Q
https://youtu.be/20gwzFz_j4E
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