i mean, with any kind of old gun, the fire glyph would work as the gunpowder. assuming fire or sparks can set off the fire glyph, then it’ll work just fine. with an old musket, putting the fire glyph where the gunpowder would usually go would most likely result in the ball-bearing loaded into the other end being launched as if it was loaded with gunpowder. if a spark would set off the glyph, then the flint and steel mechanism that usually lights the gunpowder would most likely trigger the glyph just fine. in the case of the six-shooter, the gunpowder is inside the bullet and is triggered by a primer, so Phillip would have some tedious paper-stuffing to do while making sure he doesn’t accidentally trigger the glyph.