As in removing the firing pin and such?
I was looking at this earlier. It doesn't look like you can do it without moving the rear sight.
That little plate that the firing pin protrudes through seems to be in the slide pretty tight. I'm guessing that a hole for a punch is under the sight and you have to drive the plate out while depressing the firing pin.
Will prolly need some special gadget to remove the extractor as well.
I was checking mine out to see how it comes apart. I've been a diesel tech for 20 years, I can't help myself.
2000 rounds and ya gotta send it in for a checkup. Or find a local smith that is familiar with FN's
