The M40A3 replaced the McMillan HTG stock with an A3 chassis, added a detachable box magazine, and updated the optics rail for modern scopes. It retained the Remington 700 action and 24-inch heavy stainless barrel. The A3 incorporated a new trigger group and improved accuracy potential over the A1. It served as the primary USMC sniper rifle through the mid-2000s. Type: Rifle Action: Bolt-Action Caliber: .308 Winchester Capacity: 5 Year introduced: 2001, USA Weight: 14.8 oz Overall length: 43.5" Status: Discontinued Military use: Yes Intended use: sniper, military, precision