Glock 20 Gen 3 with factory-ported barrel and slide — the C variant produced during the Gen 3 era with factory slots in barrel and slide to reduce muzzle flip from 10mm loads. Type: Pistol Action: Semi-Auto Caliber: 10mm Auto Capacity: 15 Year introduced: 2000, Austria Weight: 27.68 oz Overall length: 7.59" Status: Discontinued Intended use: Hunting, Competition