[Captain Rhino]

5"/62 caliber Mk 45 Mod 4 Gun Weapon System. Fully automatic, rotary magazine fed. 20 rnds per minute rate of fire, IIRC. When they field the Extended Range Guided Munition (ERGM), it will have a maximum effective range of 107 km (62 nautical miles) with GPS/INS accuracy.

Some time during their service life, the Arleigh Burkes' GWS will probably be up-gunned to the planned 155mm gun. Same functionality as the Mk 45 Mod 4 but at a shade under 6" they will really be light cruisers.

[fallujah-nuker]

A six inch gun is 152mm so 155mm is slightly larger.