Anyone find a problem going from a NLCI to a LCI? We are in the process of upgrading our old Dept 23s (and it includes the change to a LCI and appropriate bearing), and the LCI just doesn't want to seat properly. The rear part just won't go where it's supposed to. Took an hour to get two done! Been to the armorers class 3x. Feel like a moron. What am I doing wrong??? Wanna kill these ads? We can help!