The Technology Guide is [surprisingly] in the PRD, so... I think I'm in the right place to ask for a rule clarification instead of posting in the Golarion-related sections.
The Speed enhancement can be applied to ranged weapons... except that most of them require loading in between shots that makes it kinda impossible to use it multiple times in a row. However, bows, repeating crossbows and certain firearms can be sped up.
What about Slow-Firing weapons, such as the Rail Gun, Rocket Launcher and Vortex Gun? All 3 guns have charges that work like chambers or barrels, meaning that you don't need to reload between each shot unless it's empty. However, you cannot make more than 1 attack per round with them because they take a full action to shoot.
If I apply the Speed enhancement to them how does it work? Do I get a 2nd shot with the weapons in question?