Hi all, I am currently drooling over the Adam Arms retro-fit piston conversion kit for my Colt LE6940 5.56 DI Monolithic. I am wondering if it will fit on my AR since it is a monolithic upper. Does it even matter? The handguard is carbine length and the barrel is 16.1" I am tired of cleaning the rifle for 2 hrs (I am OCD when it comes to the cleanliness of my firearms), every time i shoot it. This kit would increase the life of my AR, anyone know anything about the conversion kit? Thanks everyone.