Commodore Swab I agree that there were devices either attached or in some cases forged on the flash pans of some of the Spanish military flintlock's. But if you check your documentation or actually translate the manual of arms in print at the time on those particular weapons you'll see that the intent of the device was to assist in priming and/or to block the wind from the flash during firing. The flash guard commonly used by reenactors today was derived from trial and error starting in the 1950s. There has been a lot of publications and other documents written over the years but very few actually cite the documents from the actual time period. Another example would be rifling in modern weapons. The first rifled bore weapons actually date back to the late 1500s. The original intent was not for accuracy but due to fouling from repeated firing. The rifling simply gave the fouling someplace to go making it easier to reload the weapon. It took several centuries before anyone realized that the rifling caused the projectile to spend giving it more accuracy and further range. Fortunately for us when it comes to the wide range of safety rules at different events, the basic safety rules are essentially the same wherever we go. But one set of safety rules for all living history interpreters or reenactors like the National Park Service uses simply don't work. The differences in the weapons from each period of time dictate deviation in the rules. I've been to events where the event organizer insisted that the World War II reenactors and the Revolutionary war reenactors operate their weapons in the same manner. Fortunately some event organizers and even some National Park Service locations are starting to recognize that safety rules need to be specific to the time period for the event. So we are making progress we just need to remember that every single person on the field of combat is a safety officer and has the responsibility to exercise common sense and ensure that they receive proper instruction and/or training prior to their participation.