Colt Mark IV Series 70 Delta Elite in 10mm — the earliest Colt 10mm 1911, produced in the Series 70 action configuration before the Series 80 firing pin block was adopted. Type: Pistol Action: Single-Action Caliber: 10mm Auto Capacity: 8 Year introduced: 1983, United States Weight: 38.5 oz Overall length: 8.5" Status: Discontinued Intended use: Competition, Collecting