The Remington Arms M40A1 USMC is a usa-made bolt-action sniper rifle chambered in .308 Winchester, introduced in 1966. Primary use: hunting, sport. Type: Rifle Action: Bolt-Action Caliber: .308 Winchester Capacity: 5 Year introduced: 1966, USA Weight: 232 oz Overall length: 44" Status: Discontinued Intended use: hunting, sport