These photos are of a prototype rail system for the Daewoo K2, which is the assault rifle used by the Korean army.
Click to expand. Photo ⓒ Chen “SMGLee” Lee. Used with permission.
Click to expand. Photo ⓒ Chen “SMGLee” Lee. Used with permission.
Click to expand. Photo ⓒ Chen “SMGLee” Lee. Used with permission.
I looks like a real improvement over the archaic standard K2 handguard.
Standard Handguard. Photo from Wikipedia.
Many thanks to Chen for the use of his photos.
More photos here.