Adventure Kit. Ready-to-Play Role Playing.
"A game of adventure on the high seas"
Basically a standalone subset of the Rolemaster rules set in the pirate era in the West Indies. Boxed set. Players were directed to use more bits from Rolemaster if they wanted more detail.
From the back of the box:
Within this box is a complete game that provides all you and your friends need for hundreds of hours of fantastic adventure in the 17th Century pirate realms of the Caribbean. *Run Out the Guns!* offers rich settings, simple rules, and an intuitive style of gaming. In no time at all, you and your players will become swashbuckling freebooters, risking all for a chance at Spanish gold....