This has to be the most difficult slide to rack that I've ever seen...'Had S&W send me a new recoil spring assembly, but still very difficult to rack...There's no binding of any type....'just hard to pull...I've put "sand-paper" style grip-tape over rear slide serrations, and that makes manipulation much easier...'but...I shouldn't have to do that....Slide moves freely along frame rails with barrel & RSA removed...Don't know if there's a problem, or not, but that grip-tape over the rear slide serrations, shouldn't be needed....Thanks in advance.