I was helping a group member with the identification of a Colt carbine which ended up being the Colt LT6720-R.

There are two things that make this carbine stand out. The standard carbine barrel and the Colt branded rail manufactured by Troy.

The LT6720-R appeared in the 2014 new products brochure and in the 2014 catalog. The LT6720-R did not appear in any marketing materials in 2013 or 2015.

They are not seen very often on the secondary market.

Would it be possible to install a pencil barrel FSB and swap the troy rail for the standard delta ring/kac handguards that came on le6920s? The idea being to essentially make a LE6720.
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You can certainly take a carbine and change the barrel on it. That would be completely up to you. Keep in mind that the LT6720-R had a ‘Colt’ branded rail on it that was manufactured by Troy.
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