I have a large and small RR linerlock sodbusters and they're fine, if more traditional in construction (brass liners, non-wedging lock engagement). The trapper liner lock, otoh, has steel liners and looks intended to wedge against the blade like a modern liner/frame lock, in addition to utilizing a closing detente. It may very well be sourced from a different vendor than their other slipjoints. On close inspection, the glue under the scales is also rather sloppy around the locking area.
I mentioned in the past that the RR folks source from a variety of countries, so it wouldn't be surprising if they source from a variety of vendors within one country, too. So just a heads up on that particular model.