New Ultralight Arms Light Mountain Rifle in 270 Winchester. The Light Mountain Rifle in 270 Win is Forbes' ultralight answer to Jack O'Connor's classic choice. Under 5.5 pounds in a long-action configuration, the 270 Win Light Mountain Rifle offers the cartridge's flat-shooting performance in a pack weight previously unachievable. For sheep hunters and high-country deer hunters where weight and long shots both matter, this is a definitive solution. Type: Rifle Action: Bolt-Action Caliber: 270 Winchester Capacity: 1 Year introduced: 2005, USA Weight: 53 oz Overall length: 42" Status: Active Intended use: hunting, mountain hunting