If you look at shotguns in general it will be noted the working parts occupy different positions in the typical boxlock vs the typical sidelock. In the Lefever, while technically a box lock the parts, particular hammers & mainsprings occupy virtually the same position in the frame as a sidelock.
Upon removing the sideplates the main spring can be removed, the hammer axle pushed out & hammers plus coocking hook can all be removed. The sear springs can also be removed. All of this without touching a stock screw. I don't recall for positive but don't think the sears themselves will come out, except of course on the early models in which they are mounted to the plates.
The plates thus are "Functional" on even the latest DS which has nothing attached to it, not even indicators. They are not merely boxlocks wearing Falsies.
