ORIGINAL: gibblet
i doubt it's a new material rutting, if you do some researching they are all made out of the same thing, or things, just about.
It is supposed to be a new material that Brownell is making just for for VT "just what I heard ", I just put a set on my Viper tec and it is preforming as advertised . Now I'll have to see how it holds up . The other plus is they are less $$ than WC