My LE6920 was built in Sep 2004. Consequently, it has a standard military style pushpin, like this:
Does yours look like this too? If so, it will accept any
standard upper-Colt or otherwise
If you want a good single stage trigger for 3-gun the Accuracy Speaks is excellent. Be sure to specify that you want the "large pin" Colt version (it will be the .170 version-not the .155).