The GLOCK 19 - G19 Gen5 9mm Luger Aluminum Slide Pistol features a 4.02-inch rifled barrel made of carbon steel and an aluminum slide. It also has a 15+1 capacity and a polymer frame. GLOCK 19 - G19 Gen5 9mm Luger Aluminum Slide Pistol - Handgun Semiauto Center Fire at Academy Sports