I have one on a Model 53E, a top of the line sidelock 20 gauge. it is perfect, has never given any problems at all. I have had a couple others on lower grade guns, one a Matador II, don't remember the other grade, but it also was a low grade boxlock, and both were very stiff, but both worked, although one of them at times required flipping the selector back and forth to "reset" the trigger for the second shot. I think that, as a general rule, on the lower grade guns their single triggers were suspect, tended certainly to be stiff, but on upper end guns they were given more attention, as was everything else on the gun, and they work fine. I still prefer two triggers on any double barreled gun, however.
