Trying to find an obscure science fiction movie?!

Question: It came out just before the original star wars, I think in early 1977. This blond-haired kid gets this awesome laser attached to his arm, but his skin gradually starts to turn green like the Hulk's...?

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Answers: It came out just before the original star wars, I think in early 1977. This blond-haired kid gets this awesome laser attached to his arm, but his skin gradually starts to turn green like the Hulk's...?

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Check "Laserblast"
http://us.imdb.com/title/tt0077834

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