I have never seen this variant of the Colt LE6920 before. This carbine was seen today (14 JUN 2020) on Gun Broker and ends today. What makes this rifle variant unique is the use of a B5 KeyMod rail handguard system. This is the only Colt factory rifle that I have seen with a KeyMod rail handguard. You can see twenty images from the auction here: https://thecoltar15resource.com/le6920pd/