I'm not quite sure about that. I'm not sure if anything was changed when the new barrel was installed. However, the conversion kit was also installed on this gun where if you happen to drop it in a puddle while hunting or in a heavy down pour, it will still fire. The conversion makes it fully waterproof. I forgot to mention that prior. As far as the cantilevered recoil lug, I'm not quite sure. Sorry for the inconvenience.