Kimber Mountain Ascent in .280 Ackley Improved with a titanium receiver, Kevlar stock, and stainless fluted barrel. One of the lightest production bolt-actions at 4.5 pounds bare. Type: Rifle Action: Bolt-Action Caliber: .280 Ackley Improved Capacity: 4 Year introduced: 2012, USA Weight: 72 oz Overall length: 41.5" Status: Active Intended use: Mountain Hunting, Backcountry Hunting, Hunting / Backcountry