Irish Brown Bess Musket and Bayonet. Dublin Castle Pattern 1769, short land musket. Of the approximately 15,000 Dublin Castle Pattern 1769 Brown Bess Muskets, approx. 8000 of them made their way into the hands of the Red Coats during the American Revolutionary War. Barrel measures 41.75" inches long and musket measures 57.5" inches in overall length. Bayonet measures 21.5" inches .Estimate $2800 to $3500