Guys, I'm looking to get some XS big dot sights installed on a Shield. I'd like to get them installed while I'm home on leave. Is there a gun store an/or gunsmith that comes recommended that could do this for me (in the Chattanooga area)? I'd be willing to buy the sights there in Chattanooga or have them shipped there. It's been about five years since I've been home. Your thoughts are appreciated! Thanks!