Thanks.CHP started getting rails on the ' d' series 4006tsw. They were riveted and crap ( rivets loose, breaking, only fit s&w light). Then went to integral rails. The 4013tsw didn't have rails
I wasn't involved in our orders, but if I'd been involved I'd have pushed for the 4513TSW, 4013TSW and 3913TSW runs to have come without those chintzy aluminum rails.
Turned out S&W offered to change the riveted rails to the machined rails half way through the runs of the 4006TSW & 4566TSW models we were getting, but the guy who took the call decided to stay with the riveted rails for the next runs. When I found out and asked him why, he said he thought it would be better for morale if all the weapons had the same rails, and half the weapons weren't equipped with the integral rails.
