I have one in .410/30". I haven't shot it a great deal, but it hasn't missed a beat in the few hundred rounds I put thru it. As you can see, the checkering is laser cut and the "engraving" is some form of either chem milling or laser, with a few cuts here and there to make it look "real".

[Linked Image from i.imgur.com]
[Linked Image from i.imgur.com]