The Lee-Enfield SMLE MK III 303 BRIT 10+1 is a bolt-action, magazine-fed repeating rifle that served as the main firearm of the military forces of the British Empire and Commonwealth during the first half of the 20th century, and was the standard service rifle of the British Armed Forces from its official adoption in 1895 until 1957. SMLE: 1904-1957 Mass 8.73 lb (3.96 kg) (Mk III) Length SMLE No. 1 Mk III: 44.57 in (1,132 mm) Barrel length SMLE No. 1 Mk III: 25.2 in (640 mm) Cartridge.303 British Action Bolt-action Rate of fire 20-30 aimed shots per minute Muzzle velocity 2,441 ft/s (744 m/s) Effective firing range 550 yd (503 m) Maximum firing range3,000 yd (2,743 m) Feed system10-round box magazine Sights Sliding ramp rear sights, fixed-post front sights USED, CLEAN!