The musket is now loaded and ready to be fired. In order for the weapon to fire, the lock must be moved from the half cocked position to the fully cocked position. This is done with a quick flick of the thumb. The only thing left is to take aim and fire.
Palo Alto Battlefield National Historical Park, Texas, US NPS
<a rel="nofollow" class="external text" href="https://www.nps.gov/paal/planyourvisit/upload/Musket-drill-copy.pdf">Musket drill copy, U.S. National Park Service Official Web-site</a>