 Other weapons such as the Heckler & Koch MP5 sub-machine gun, the M16 assault rifle (now replaced by the M4 Carbine rifle), the SIG Sauer SIG 516 assault rifle and the ARWEN 37 anti-riot weapon are also issued to and stowed aboard each patrol craft (depending on the type of patrol-craft; for example, with the Interceptor Squadron being equipped with the MP5 and CPS and the Port Squadron being equipped with the M4 rifle), with a pump-action shotgun and the FN 303 as additional firearms for the Special Task Squadron.Mounted on the patrol-boats themselves are heavier weapons such as the FN General Purpose Machine Gun (GPMG), the Oerlikon 20mm auto-cannon and/or the Browning M2 Heavy Machine Gun (HMG), depending on the type of patrol-craft (the older 3rd-Generation of PT-class is issued with the GPMG whilst the newer PIB-class PT-class patrol-boats are equipped with an automatic gun-turret, fitted with an electrically-operated M2 Browning HMG, on its roof; all CPC carry 20mm auto-cannon guns, their main armament).There are currently eight types of boats utilised by the PCG, namely the Command Boat, the Coastal Patrol Craft (CPC), three types of PT boats, the new PC class Patrol Craft, the PK class Interceptor Craft for the Special Task Squadron, and the PJ Class inflatable boats for localised patrols, particularly up smaller rivers and canals.