George Hickenlooper will direct the coming-of-age thriller “Blue Mountain” for Carson Signature Films and Chapman Ventures.Story, set in a small Southern town, concerns a stolen gun that may have been linked to the assassination of Robert F. Kennedy. Pic’s backdrop stems from the theory that RFK assassin Sirhan Sirhan did not act alone. Script was penned by Darby Connor. Beaux Carson, Heidi Levitt and Donald Zuckerman will produce. Hickenlooper plans to segue to “Blue Mountain” after wrapping the Edie Sedgwick biopic “Factory Girl,” which should lense this spring. Chapman Ventures, which brought the financing, will exec produce, with prexy Laurie Chapman overseeing the project for the company.