The weapon that Rambo holds in the helicopter is a single shot LAW rocket, which has a trigger on the top of the tube. This is followed by a short close up of his finger pulling the conventional trigger of a rocket propelled grenade (RPG). The LAW is back in the next shot.
Correct me if I am wrong here but there is no movie called simply "Rambo". I do believe the film was called "First Blood". "Rambo" was not used in the title until the 2nd release.
To Westopher,
According to every filmography for Sly that I could find, (as well as the video itself on the shelf at Blockbuster) the titles of the films are as follows:
First Blood
Rambo:First Blood Part II
Rambo III
He's right. There was no movie called Rambo: First Blood. The first movie was called, simply, "First Blood". Please know what you're talking about before you waste cyberspace with your drivel.