BFI SBR XM-15
I also have an LMT 10.5" on my FA Colt, but this could also wear a 14.5" Bushy, a 10.5" RR 9mm as well as the current dedicated .22 setup. No need for a FF rail on this heavy bbl .22. May put a FSB side sling unit on or go with a single point rear rec plate and a set of KNS pins. Cheap sights, but, it's a .22. Too many other flattops to dress up.