The Desert Tech MDR in 7.62x51mm/.308 Winchester uses the same forward-ejection bullpup action as the 5.56 version with a longer receiver optimized for the full-power cartridge. The MDR .308 delivers full-power battle rifle performance in a 27.5-inch overall length with an 18-inch barrel — shorter than most conventional .308 semi-autos with far shorter barrels. Converts to 6.5 Creedmoor with a barrel swap. Type: Rifle Action: Semi-Automatic Caliber: 7.62x51mm NATO Capacity: 20 Year introduced: 2017, USA Weight: 108 oz Overall length: 27.5" Status: Active Intended use: precision, tactical, sporting