This is a Kaman SH-2 Seasprite, a U.S Navy ship-based anti-submarine and search & rescue helicopter. Introduced in 1963, the Seasprite saw service in the Vietnam and Gulf Wars, and flew until 1993 with the U.S Navy, as well as being operated in small numbers by a several other nations.
This excellent (and rather wonderfully liveried) SH-2 Seasprite is the work of Robson M (aka BrickDesigners), who has captured both it and the rather exciting looking weaponry slung underneath beautifully.
Top quality building techniques and presentation abound, and there’s more to see of the SH-2, including its folding landing gear, opening doors, and cartoonesque missiles, at Robson’s photostream. Click the link above to get airborne.