LEE-ENFIELD MODEL NO.4 MK1 Caliber: .303 British Overall Length: 44.5 inches (1,130 mm) Barrel Length: 25.2 inches (640 mm) Action: Cock-on-close bolt action Feed System: 5-round detachable box magazine Receiver-Mounted Aperture Sights: Moved the rear sight from the mid-barrel to the rear of the receiver, featuring a fixed 300-yard battle sight and a flip-up ladder sight graduated up to 1,300 yards