Midwest Trophy and Engraving - 7341 W 97th St, Overland Park, KS 66212 - (913) 642-2451
http://midwestengravers.com/
I've dealt with the owner Cole a number of times and his services are fantastic. He can engrave things I never knew could be engraved. He also engraved my lower for my SBR.
Edit - I guess they've changed their name to Midwest Engravers - Same great service though