I got the BAK Revolver X4s. I like the concept of it, but the execution leaves something to be desired. It's obvious they modify parts of these by hand, and their QC must not be that great. There are several places on my rails where they started cutting, got 1/8" to 1/4" in and then stopped. The seals on the rails that go against the bed were installed incorrectly. However the worst part is where the rails overhang the tailgate. They didn't remove enough material from the rails and I can't close the tailgate.
I know anyone can make mistakes. I try not to judge a company on making the mistake, but instead on how they correct them. Here BAK has done a really poor job. I contacted them by email over three weeks ago and so far my problems have not been resolved. The pattern is I'll send an email, then three business days later I get a response asking for additional information or pictures. I'll provide that immediately, then 3 business days later I'll get another response asking for additional information or pictures. Most of which I have provided previously. This repeats over and over again... They seem to have no interest in helping, they just want to pass everyone off to the next customer service agent.