Sig Sauer, maker of Orlando gunman's weapon, is expanding rapidly in U.S.

BOSTON, June 15 (Reuters) - Sig Sauer Inc, maker of the semi-automatic rifle believed to have been used in the Orlando shooting rampage, has been growing rapidly in the United States, with plans to sell more silencers and ammunition while vying for a contract to supply several hundred thousand handguns to the U.S. military.