I cannot say if it's true or not, but like One stated...it would not surprise me. The only factor that would push me towards maybe calling "BS" is that the tech would not be cheap to implement.
I have one that I have never shot. Kind of strange story. Soon after I purchased my RFB, got a call from Kel-Tec asking for the rifle back. It seems that a couple of pups were released in a non standard factory configuration. My RFB is marked 7.62 and has a bull barrel with muzzle device...