Hey guys! Can save you some time and trouble here. I did a test on these for the guy who invented them on Excaliburs and they WON"T WORK on them. Two reasons, the trigger guards are too thick and once I filed off the bottom of a trigger guard, where they did fit, the radius of his trigger won't match up w/ radius of Excal triggers. Being an old muzzle loader competition shooter [on a very small scale] I liked the double set triggers on m/l and had visions of a target set up using this little goodie even though my Excal triggers are sweet as is. They also won't work on xbows that have alot of trigger travel. They are designed to fit on thin metal trigger guards common to most rifles but not xbows. Have fun!