the issue with Rock River as I understood it, was that stock is somehow differently sized than mil-spec. Meaning, after market stocks may be an issue (someone step in here, I'm not 100% informed). I personally have a S&W, its been great and has a great fit and finish, I'm told one of the tighter in the industry (at this price level), though at least initially S&W's were built by stag. Could still be...