** U.S. military shipbuilder Huntington Ingalls Industries' HII.N shares rise 6.9% to $319 premarket
** HII beats Q3 profit estimate amid robust demand for its aircraft carriers and submarines
** Posts Q3 sales and service revenue of $3.19 bln, beating Wall Street estimate of $2.96 bln
** Reports Q3 profit of $3.82 per share, above analysts' estimate of $3.36 per share, according to data compiled by LSEG
** Raises lower end of FY shipbuilding revenue forecast to $9 bln, up from prior range of $8.9–$9.1 bln
** As of last close, shares up 57.92% YTD
(Reporting by Megavarshini G. Somasundaram in Bengaluru)
((Megavarshini.SomasundaramGnanasundari@thomsonreuters.com))