It's a special Curator's Corner. John Popp and NRA Museums firearms special Logan Metesh are looking at fully-functional Hotchkiss Revolving Cannon in miniature. The original was designed in 1870, firing a full-size 37mm round and manned by a three-man crew. The mini fires an 11mm service round. It's a beautifully-detailed part of the Robert E. Petersen Gallery at the NRA National Firearms Museum in Fairfax, Virginia.