Conversion of No.4 Mk I to Mk II standard at Royal Ordnance Factory. Heavier trigger, two-piece stock retained. Designation reflects conversion origin. Type: Rifle Action: Bolt-Action Caliber: 303 British Capacity: 10 Year introduced: 1949, UK Weight: 181 oz Overall length: 44.45" Status: Discontinued Military use: Yes Intended use: Military, Collector