God bless simplicity
The Bandito guns were made by Aqua Craft and you'd see a bunch of them back in the day, (late 70's -80's) as they were affordable and had a pretty simple set up. Like the Voit, er Mares, er, JBL guns of then and now, their biggest problem was the owner- not washing them off, keeping from using them as a crowbar to get that big big waaay back there, and really overloading them powerwise w/o checking the trigger sear.
The line release is a pretty simple thing though when they wear out you're kinda buggered. Remember that the release rests against the trigger body in a way that as the spear goes forward, the release is flipped along with it, so the angle of the thing is reveresed from what a person on the street looking at one for the first time would assume. If the release is sticking, take a good file and smooth the tab that is pinned inside the trigger assy- just enought to remove any dings or wear. Shmear some silicone grease in the thing, put the works back together and you ought to be smooth.
They're made of fair quality aluminum and good stainless so keep an eye at the screws and all areas where electrolysis is going to show itself as a white rust forming. Bottom line- the bandito is good general purpose setup and a very forgiving tool to learn with.