Intercepting sears are usually, if not only, seen on sidelocks. The sear/hammer design and relationship on a Lefever side-plate Syracuse action is so different from the typical sidelock action, trying to add intercepting sears would be as useful as adding air conditioning to a motorcycle and probably more difficult. Has anyone ever heard of a Lefever jarring loose and firing accidentally. Lefever claimed it couldn't happen. That's certainly more believable than the claim of a continuous tapered choke, from chamber to muzzle.
If you're going to build a Lefever reproduction, reproduce the Lefever design, for Petes's sake.
