Bristol Junction from Bristol Temple Meads is operated by South Western Railway, and there are scheduled coach links to most major UK cities. The M4 motorway connects the city on an east-west axis from London to West Wales, and the M5 is a north–south west axis from Birmingham to Exeter. The M49 motorway is a shortcut between the M5 in the south and the M4 Severn Crossing in the west, and the M32 is a spur from the M4 to the city centre. The Portway connects the M5 to the city centre, and was the most expensive road in Britain when
M4 carbine producing an "M4" in all but name. The M4 falls under restrictions of Title II of the National Firearms Act. The 14.5 inch barrel makes the M4 a Short Barrel Rifle (SBR) and select fire capability (semi-automatic and full automatic or burst-automatic) makes the M4 a machine gun. Civilian replicas of the M4 typically have 16 inch barrels (or standard 14.5 inch M4 barrels with permanently attached flash suppressors with a total length of 16 inches) and are semi-automatic-only to meet the legal definition of a rifle under the Gun Control Act. Civilian-legal M4s are also popular with police as