FWIW, I had Ident Marketing do mine and it looks awesome:
http://identmarking.com/index.php/sbr-logo-engraving
A lot of people use Orion Arms, but honestly I had some issues with them responding to questions and there was no # to call. My father-in-law had his done at an engraver in Suwanee and it looks terrible. I couldn't be more happy with Ident and the turn-around was really fast.
