GETTING MY FRT-15L3 TO WORK

Also any individual know someone who does magnificent engraving that could make me a 3rd position marking on a Aero M4E1 reduced to match the Secure and fire markings style it's got? Or an honest vinyl sticker that could go there if all else fails."Here's the modification needed to get the greater-Mag S&W Adapter to work With all the CMMG Sear Jour