Nope. Looking at the underside of that breechblock, one can clearly see the safety shaft on either side of the breechblock, and the little spring that keeps it from falling on the ground in the event you use the gun. I have had pretty good luck just slowly rotating the safety head, if it is the lever type, and keeping outward tension on the lever, until it can be withdrawn from the hole. Hard case guns will require you to lift up on the spring itself while holding the breechblock upside down, and having a helper withdraw the safety. This is standard operating procedure for a button type safety, which, most people don't have. Button type safetys CAN NOT be reversed. If you are looking at rotating the safety to the other side of the breechblock, pay attention to the notch filed into it, and you can duplicate it, with a small file, 180 degrees opposite and retain the detent.
The plate has lubicating oil which has turned to varnish holding it in. Patience is a virtue when taking most old guns apart, especially a Darne.
I mentioned there isn't a good reason to do this unless it's broken, right?
Best,
Ted
