Knubley of London made this cool Knubley Flintlock in 1778-1790. The pistol is 14 ½” long and 21” with the bayonet extended. There is a thumb release on the top of the tang. The bore measures 13/16” inside diameter and the barrel is 8 7/8” long. The brass trigger guard and final are engraved as well as the screw heads. The mechanical function is very good and the manual lock safety works very good. I see only one small tight crack on each side of the lock screw. This is a RARE Blunderbuss pistol with a spring-loaded bayonet.