I don't have a lot of LC experience with just having owned a 4-5, but my post war Ideal 12g ejector gun has a roller latch as above but the barrel lug is different. Rather than the sloped back with the round bottom centering hole for the spring, mine has a vee notch for the roller to engage.
So...what does the roller engage on the gun above? Could this be an assemblage of parts? Possibly the beavertail FE was from an ejector gun and they left the roller escutcheon on the forend just to fill the hole?
