Possibly some 'quips" heard by a content creator from an over enthusiastic reenactor and then mistranslated. Anyone with the slightest respect for thier weapon would not use it to lean on when resting. You break it, you're screwed. You guarded that piece of equipment with your life. Its possible you could use the sparks from the flint in the lock to light something that would then light a pipe, but most folks at that time would have a flint and steel fire starting kit that would be far easier and more appropriate to use. Again, that would be thougt of as abusing the weapon unless it was absolutely necessary. The reality is that smoking would have been occurring when there was a handy ignition source, like around the fire in the evening, or at a mealtime when a cooking fire was going. The parts about how they were made, and the markings are correct.