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It is not factory engraving, but, I contacted Ruger for a recommendation of an engraver. They sent me the contact info of 3 engravers that had done or were doing engraving on Ruger factory guns. I contacted all three. 2 of them anneal the receivers before engraving and have them re-heat treated after engraving. The third engraver, Frank Conroy, did not anneal the receivers. He said he was constantly sharpening his engraving tools when using them on hardened receivers. So I sent my barrelled action to Mr. Conroy and I am very pleased with the results.