Colt is now selling complete upper kits in various barrel lengths and configurations. This is derived from LE6920 and LE6940 models. It will be offered on Colt's online store. Price will be $740 - $1,056
Link:
http://www.colt.com/ShopOnline.aspx
Press release:
http://www.colt.com/ColtintheMedia/PressReleases/tabid/252/articleType/ArticleView/articleId/103/Colt-Upper-Receiver-Assembly-Kits-Now-Available-in-Various-Lengths-and-Configurations.aspx
From: Colt