I wanted to engrave the Second Amendment into my Bushmaster AR15, but after talking with engravers, I found out the only way to do it would be LASER engraving. A costly method because they have to make a jig to hold the reciever, set up the tool paths, etc, etc, etc... It might be worthwhile for about 1000 AR15s, but not 1 custom job since I'm not exactly rolling in the dough.