Looks like Remington's ready to give it another go...
Remington Announces R51 Pistol Update
While we determined the pistols were safe, certain units did not meet Remington’s performance criteria. The performance problems resulted from complications during our transition from prototype to mass production. These problems have been identified and solutions are being implemented, with an expected production restart in October.
Anyone who purchased an R51 may return it and receive a new R51 pistol, along with two additional magazines and a custom Pelican case, by calling Remington at (800) 243-9700.
Remington Announces R51 Pistol Update