Personnel from the UK Commando Force have been issued with the Sig Sauer MCX – a new rifle for specialist operations, including counter-terrorism.The MCX replaces the L119A1 rifles produced by Colt Canada and is designed to complement the Commandos’ new general-use weapon, the L403A1, better known as the KS-1.While at first glance the Sig Sauer MCX may resemble an AR-style platform, the two weapons systems are not the same.