Thanks for that.
Ships Weapons:
2 - Mk 31 Mod 1 RAM Guided Missile Weapon System
2 - Mk 46 Mod 1 30mm Gun (Ship version of Expeditionary Fighting Vehicle Gun)
4 - MK 26 Mod 17 .50 Cal Machine Guns
http://www.fas.org/programs/ssp/man/uswpns/navy/amphibious/lpd17.html