Roo, I don't use my pressure cooker for anything but canning. Just looking inside it doesn't inspire confidence to put food directly in it, although maybe some application of vinegar to clean out the lime scale might help.
Slim, I have "real" bayonets for the Lebel and Gras, and a fake "repro" that fits the '03 and probably also the Krag, but fit in this case is a relative term. As in, I managed to file and weld enough to get it to latch on, but it's pretty wobbly and might not stay on if shooting ball ammo. It did stay on for shooting GAF cast loads. Also, the Trapdoor has one, it's a rod bayonet model.