This what CSMC had to say about the RBL single triggers, as posted in a FAQ section on the RBL website:
18. Single Trigger. It is a single trigger with selection in the trigger, very similar to a Model 21. We feel it is the most reliable trigger we know of. Because the top and bottom tang are joined in the rear, and the use of a drawbolt for the stock, there is no movement between the top and bottom tang because they are joined almost as one piece and movement of the top and bottom tang creates most of the problems with single triggers. When top and bottom tang screws are eliminated on the RBL, because the use of the draw bolt, this eliminates most of the problems.
And therein, perhaps, lies the problem. Which sxs have a reputation of ST's we're told to avoid? Mainly British and
Spanish--the latter mostly copying the former. And you'll look long and hard, I think, to find a British or Spanish sxs that's a drawbolt gun. Most of them are the old tang screw design. I'd always thought the fact that ST's on OU's are more reliable had to do with the different alignment of the working parts. But it's certainly true that there's a greater degree of unreliability with ST's on sxs, even if they're still quite reliable--in most cases.
